There are many fundamental qualities that can be observed but not quantified. General intelligence being one of them (intelligence tests measure some aspects of

There are many fundamental qualities that can be observed but not quantified. General intelligence being one of them (intelligence tests measure some aspects of it, but not others). If everything that is real could be quantified, we wouldn't need AI. Traditional computing is already absolutely phenomenal at dealing with quantifiable systems. The whole point of wanting "artificial intelligence" is because we don't know how to quantify the high-level properties of speech, thought, intellect, and consciousness. And not for lack of trying.