In 1950 the mathematician Alan Turing proposed what came to be called the Turing Test: if a human observer screened from other clues judged its responses as indistinguishable from those of a human then it was reasonable to describe a machine as thinking.
I similarly tend to take a similarly conservative approach to AI.
Sorry, I see on reading that back that I got a bit carried away with the word 'similarly' there 😞. Too late at night to think straight!