Champion
debater Harish Natarajan argues against IBM Debater, represented by a screen
with a blue oval, in a competition at the IBM Think conference. Stephen Shankland/CNET
The subject under debate was
whether the government should subsidize preschools. But the real question was
whether a machine called IBM Debater could out-argue a top-ranked human
debater.
The answer, on Monday night, was
no.
Watch
this:Hear IBM
Debater argue with a human -- and lose 3:18
Harish Natarajan, the grand finalist at the 2016 World Debating
Championships, swayed more among an audience of hundreds toward his point of
view than the AI-powered IBM Debater did toward its. Humans, at least
those equipped with degrees from Oxford and Cambridge universities, can still
prevail when it comes to the subtleties of knowledge, persuasion and argument.
"What really struck me is the potential value of IBM Debater
when [combined] with a human being," Natarajan said after the debate.
IBM's AI was able to dig through mountains of information and offer useful
context for that knowledge, he said.
It was the second time IBM Debater took on humans in public,
though it's taken part in dozens of debates behind Big Blue's walls. In the
first IBM Debater competition, the
AI defeated one human debater soundly while losing a closer competition with
another. This time, though, the human opponent was tougher -- indeed, IBM
researchers involved in the years-long project expected their AI would lose.
Computer
persuasion
IBM Debater lost, but there's no question it won in a way:
Listening to it, you evaluate what it's saying, not just that it's a computer
saying something. The machine marshaled its argument, broke that down into a
few points and backed them up with data from various studies. It wasn't
perfect, but it was on point.
And, weirdly for an AI, it told us how Homo sapiens ought to
behave.
"Giving opportunities to the less fortunate should be a moral
obligation for any human being," IBM Debater said.
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