Ethics of AI: Benefits and risks of artificial intelligence


liu, tempo Date: 2021-06-18 17:53:08
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The increasing scale of AI — in terms of the size of neural networks, their energy use, the size of data sets, and the prevalence of the technology in society — is raising the stakes for major ethical questions.

In 1949, at the dawn of the computer age, the French philosopher Gabriel Marcel warned of the danger of naively applying technology to solve life’s problems.

Life, Marcel wrote in Being and Having, cannot be fixed the way you fix a flat tire. Any fix, any technique, is itself a product of that same problematic world, and is therefore problematic, and compromised.

Marcel’s admonition is often summarized in a single memorable phrase: “Life is not a problem to be solved, but a mystery to be lived.”

Despite that warning, seventy years later, artificial intelligence is the most powerful expression yet of humans’ urge to solve or improve upon human life with computers.

But what are these computer systems? As Marcel would have urged, one must ask where they come from, whether they embody the very problems they would purport to solve.

WHAT IS ETHICAL AI?

Ethics in AI is essentially questioning, constantly investigating, and never taking for granted the technologies that are being rapidly imposed upon human life.

That questioning is made all the more urgent because of scale. AI systems are reaching tremendous size in terms of the compute power they require, and the data they consume. And their prevalence in society, both in the scale of their deployment and the level of responsibility they assume, dwarfs the presence of computing in the PC and Internet eras. At the same time, increasing scale means many aspects of the technology, especially in its deep learning form, escape the comprehension of even the most experienced practitioners.

Ethical concerns range from the esoteric, such as who is the author of an AI-created work of art; to the very real and very disturbing matter of surveillance in the hands of military authorities who can use the tools with impunity to capture and kill their fellow citizens.

Somewhere in the questioning is a sliver of hope that with the right guidance, AI can help solve some of the world’s biggest problems. The same technology that may propel bias can reveal bias in hiring decisions. The same technology that is a power hog can potentially contribute answers to slow or even reverse global warming. The risks of AI at the present moment arguably outweigh the benefits, but the potential benefits are large and worth pursuing.

As Margaret Mitchell, formerly co-lead of Ethical AI at Google, has elegantly encapsulated, the key question is, “what could AI do to bring about a better society?”

AI ETHICS: A NEW URGENCY AND CONTROVERSY
Mitchell’s question would be interesting on any given day, but it comes within a context that has added urgency to the discussion.

Mitchell’s words come from a letter she wrote and posted on Google Drive following the departure of her co-lead, Timnit Gebru, in December. Gebru made clear that she was fired by Google, a claim Mitchell backs up in her letter. Jeff Dean, head of AI at Google, wrote in an internal email to staff that the company accepted the resignation of Gebru. Gebru’s former colleagues offer a neologism for the matter: Gebru was “resignated” by Google.

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Mitchell, who expressed outrage at how Gebru was treated by Google, was fired in February.

The departure of the top two ethics researchers at Google cast a pall over Google’s corporate ethics, to say nothing of its AI scruples.

As reported by Wired’s Tom Simonite last month, two academics invited to participate in a Google conference on safety in robotics in March withdrew from the conference in protest of the treatment of Gebru and Mitchell. A third academic said that his lab, which has received funding from Google, would no longer apply for money from Google, also in support of the two professors.

Google staff quit in February in protest of Gebru and Mitchell’s treatment, CNN’s Rachel Metz reported. And Sammy Bengio, a prominent scholar on Google’s AI team who helped to recruit Gebru, resigned this month in protest over Gebru and Mitchell’s treatment, Reuters has reported.

A petition on Medium signed by 2,695 Google staff members and 4,302 outside parties expresses support for Gebru and calls on the company to “strengthen its commitment to research integrity and to unequivocally commit to supporting research that honors the commitments made in Google’s AI Principles.”

Gebru’s situation is an example of how technology is not neutral, as the circumstances of its creation are not neutral, as MIT scholars Katlyn Turner, Danielle Wood, Catherine D’Ignazio discussed in an essay in January.

“Black women have been producing leading scholarship that challenges the dominant narratives of the AI and Tech industry: namely that technology is ahistorical, ‘evolved’, ‘neutral’ and ‘rational’ beyond the human quibbles of issues like gender, class, and race,” the authors write.

During an online discussion of AI in December, AI Debate 2, Celeste Kidd, a professor at UC Berkeley, reflecting on what had happened to Gebru, remarked, “Right now is a terrifying time in AI.”

“What Timnit experienced at Google is the norm, hearing about it is what’s unusual,” said Kidd.

The questioning of AI and how it is practiced, and the phenomenon of corporations snapping back in response, comes as the commercial and governmental implementation of AI make the stakes even greater.

AI RISK IN THE WORLD
Ethical issues take on greater resonance when AI expands to uses that are far afield of the original academic development of algorithms.

The industrialization of the technology is amplifying the everyday use of those algorithms. A report this month by Ryan Mac and colleagues at BuzzFeed found that “more than 7,000 individuals from nearly 2,000 public agencies nationwide have used technology from startup Clearview AI to search through millions of Americans’ faces, looking for people, including Black Lives Matter protesters, Capitol insurrectionists, petty criminals, and their own friends and family members.”

Clearview neither confirmed nor denied BuzzFeed’s’ findings.

New devices are being put into the world that rely on machine learning forms of AI in one way or another. For example, so-called autonomous trucking is coming to highways, where a “Level 4 ADAS” tractor trailer is supposed to be able to move at highway speed on certain designated routes without a human driver.

A company making that technology, TuSimple, of San Diego, California, is going public on Nasdaq. In its IPO prospectus, the company says it has 5,700 reservations so far in the four months since it announced availability of its autonomous driving software for the rigs. When a truck is rolling at high speed, carrying a huge load of something, making sure the AI software safely conducts the vehicle is clearly a priority for society.

Another area of concern is AI applied in the area of military and policing activities.

Arthur Holland Michel, author of an extensive book on military surveillance, Eyes in the Sky, has described how ImageNet has been used to enhance the U.S. military’s surveillance systems. For anyone who views surveillance as a useful tool to keep people safe, that is encouraging news. For anyone worried about the issues of surveillance unchecked by any civilian oversight, it is a disturbing expansion of AI applications.

MASS SURVEILLANCE BACKLASH

Calls are rising for mass surveillance, enabled by technology such as facial recognition, not to be used at all.

As ZDNet’s Daphne Leprince-Ringuet reported last month, 51 organizations, including AlgorithmWatch and the European Digital Society, have sent a letter to the European Union urging a total ban on surveillance.

And it looks like there will be some curbs after all. After an extensive report on the risks a year ago, and a companion white paper, and solicitation of feedback from numerous “stakeholders,” the European Commission this month published its proposal for “Harmonised Rules On Artificial Intelligence For AI.” Among the provisos is a curtailment of law enforcement use of facial recognition in public.

“The use of ‘real time’ remote biometric identification systems in publicly accessible spaces for the purpose of law enforcement is also prohibited unless certain limited exceptions apply,” the report states.

The backlash against surveillance keeps finding new examples to which to point. The paradigmatic example had been the monitoring of ethic Uyghurs in China’s Xianxjang region. Following a February military coup in Myanmar, Human Rights Watch reports that human rights are in the balance given the surveillance system that had just been set up. That project, called Safe City, was deployed in the capital Naypidaw, in December.

As one researcher told Human Rights Watch, “Before the coup, Myanmar’s government tried to justify mass surveillance technologies in the name of fighting crime, but what it is doing is empowering an abusive military junta.”

As if all those developments weren’t dramatic enough, AI has become an arms race, and nations have now made AI a matter of national policy to avoid what is presented as existential risk. The U.S.’s National Security Commission on AI, staffed by tech heavy hitters such as former Google CEO Eric Schmidt, Oracle CEO Safra Catz, and Amazon’s incoming CEO Andy Jassy, last month issued its 756-page “final report” for what it calls the “strategy for winning the artificial intelligence era.”

The authors “fear AI tools will be weapons of first resort in future conflicts,” they write, noting that “state adversaries are already using AI-enabled disinformation attacks to sow division in democracies and jar our sense of reality.”

The Commission’s overall message is that “The U.S. government is not prepared to defend the United States in the coming artificial intelligence era.” To get prepared, the White House needs to make AI a cabinet-level priority, and “establish the foundations for widespread integration of AI by 2025.” That includes “building a common digital infrastructure, developing a digitally-literate workforce, and instituting more agile acquisition, budget, and oversight processes.”

REASONS FOR ETHICAL CONCERN IN THE AI FIELD

Why are these issues cropping up? There are issues of justice and authoritarianism that are timeless, but there are also new problems with the arrival of AI, and in particular its modern deep learning variant.

Consider the incident between Google and scholars Gebru and Mitchell. At the heart of the dispute was a research paper the two were preparing for a conference that crystallizes a questioning of the state of the art in AI.

The paper, coauthored by Emily Bender of the University of Washington, Gebru, Angelina McMillan-Major, also of the University of Washington, and Mitchell, titled “On the Dangers of Stochastic Parrots: Can Language Models Be Too Big?” focuses on a topic within machine learning called natural language processing, or NLP.

The authors describe how language models such as GPT-3 have gotten bigger and bigger, culminating in very large “pre-trained” language models, including Google’s Switch Transformer, also known as Switch-C, which appears to be the largest model published to date. Switch-C uses 1.6 trillion neural “weights,” or parameters, and is trained on a corpus of 745 gigabytes of text data.

The authors identify two risk factors. One is the environmental impact of larger and larger models such as Switch-C. Those models consume massive amounts of compute, and generate increasing amounts of carbon dioxide. The second issue is the replication of biases in the generation of text strings produced by the models.

The environment issue is one of the most vivid examples of the matter of scale. As ZDNet has reported, the state of the art in NLP, and, indeed, much of deep learning, is to keep using more and more GPU chips, from Nvidia and AMD, to operate ever-larger software programs. Accuracy of these models seems to increase, generally speaking, with size.

But there is an environmental cost. Bender and team cite previous research that has shown that training a large language model, a version of Google’s Transformer that is smaller than Switch-C, emitted 284 tons of carbon dioxide, which is 57 times as much CO2 as a human being is estimated to be responsible for releasing into the environment in a year.

It’s ironic, the authors note, that the ever-rising cost to the environment of such huge GPU farms impacts most immediately the communities on the forefront of risk from change whose dominant languages aren’t even accommodated by such language models, in particular the population of the Maldives archipelago in the Arabian Sea, whose official language is Dhivehi, a branch of the Indo-Aryan family:

The second concern has to do with the tendency of these large language models to perpetuate biases that are contained in the training set data, which are often publicly available writing that is scraped from places such as Reddit. If that text contains biases, those biases will be captured and amplified in generated output.

The fundamental problem, again, is one of scale. The training sets are so large, the issues of bias in code cannot be properly documented, nor can they be properly curated to remove bias.

“Large [language models] encode and reinforce hegemonic biases, the harms that follow are most likely to fall on marginalized populations,” the authors write.

ETHICS OF COMPUTE EFFICIENCY

The risk of the huge cost of compute for ever-larger models has been a topic of debate for some time now. Part of the problem is that measures of performance, including energy consumption, are often cloaked in secrecy.

Some benchmark tests in AI computing are getting a little bit smarter. MLPerf, the main measure of performance of training and inference in neural networks, has been making efforts to provide more representative measures of AI systems for particular workloads. This month, the organization overseeing MLPerf, the MLCommons, for the first time asked vendors to list not just performance but energy consumed for those machine learning tasks.

Regardless of the data, the fact is systems are getting bigger and bigger in general. The response to the energy concern within the field has been two-fold: to build computers that are more efficient at processing the large models, and to develop algorithms that will compute deep learning in a more intelligent fashion than just throwing more computing at the problem.

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On the first score, a raft of startups have arisen to offer computers dedicate to AI that they say are much more efficient than the hundreds or thousands of GPUs from Nvidia or AMD typically required today.

They include Cerebras Systems, which has pioneered the world’s largest computer chip; Graphcore, the first company to offer a dedicated AI computing system, with its own novel chip architecture; and SambaNova Systems, which has received over a billion dollars in venture capital to sell both systems but also an AI-as-a-service offering.

“These really large models take huge numbers of GPUs just to hold the data,” Kunle Olukotun, Stanford University professor of computer science who is a co-founder of SambaNova, told ZDNet, referring to language models such as Google’s BERT.

“Fundamentally, if you can enable someone to train these models with a much smaller system, then you can train the model with less energy, and you would democratize the ability to play with these large models,” by involving more researchers, said Olukotun.

Those designing deep learning neural networks are simultaneously exploring ways the systems can be more efficient. For example, the Switch Transformer from Google, the very large language model that is referenced by Bender and team, can reach some optimal spot in its training with far fewer than its maximum 1.6 trillion parameters, author William Fedus and colleagues of Google state.

The software “is also an effective architecture at small scales as well as in regimes with thousands of cores and trillions of parameters,” they write.

The key, they write, is to use a property called sparsity, which prunes which of the weights get activated for each data sample.

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