A fortnight ago, we woke upto the news that Google has created AI capable of human emotions. This article takes a very different view of the whole furore around ‘sentient AI’: “When you read a sentence like this one, your past experience tells you that it Is written by a thinking, feeling human. And, in this case, there is indeed a human typing these words: (Hi, there!) But these days, some sentences that appear remarkably humanlike are actually generated by artificial intelligence systems trained on massive amounts of human text.
People are so accustomed to assuming that fluent language comes from a thinking, feeling human that evidence to the contrary can be difficult to wrap your head around. How are people likely to navigate this relatively uncharted territory? Because of a persistent tendency to associate fluent expression with fluent thought, it is natural – but potentially misleading – to think that if an AI model can express itself fluently, that means it thinks and feels just like humans do.
Thus, it is perhaps unsurprising that a former Google engineer recently claimed that Google’s artificial intelligence system LaMDA has a sense of self because it can eloquently generate text about its purported feelings. This event and the subsequent media coverage led to a number of rightly sceptical articles and posts about the claim that computational models of human language are sentient, meaning capable of thinking and feeling and experiencing…as language researchers, we can use our work in cognitive science and linguistics to explain why it is all too easy for humans to fall into the cognitive trap of thinking that an entity that can use the language fluently is sentient, conscious or intelligent.”
So why can’t we as human beings distinguish between language (and emotions) from a machine versus the real thing from human beings? The explanation contained in this article is beautifully written and that is why we included this piece in this week’s 3 longs & shorts. For the full explanation with visuals please read the entire piece. Here are the highlights:
“Text generated by models like Google’s LaMDA can be hard to distinguish from text written by humans. This impressive achievement is a result of a decadeslong program to build models that generate grammatical, meaningful language.
Early versions dating back to at least the 1950s, known as n-gram models, simply counted up occurrences of specific phrases and used them to guess what words were likely to occur in particular contexts. For instance, it is easy to know that “peanut butter and jelly” is a more likely phrase than “peanut butter and pineapples”. If you have enough English text, you will see the phrase “peanut butter and jelly” again and again but might never see the phrase “peanut butter and pineapples”.
Today’s models, sets of data and rules that approximate human language, differ from these early attempts in several important ways. First, they are trained on essentially the entire internet. Second, they can learn relationships between words that are far apart, not just words that are neighbours.
Third, they are tuned by a huge number of internal “knobs” – so many that it is hard for even the engineers who design them to understand why they generate one sequence of words rather than another.
The models’ task, however, remains the same as in the 1950s: determine which word is likely to come next. Today, they are so good at this task that almost all sentences they generate seem fluid and grammatical.”
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