Given that we don't know how google search currently works, that's some serious speculation on your part. We've made quite some progress since the 80s. For exa

Given that we don't know how google search currently works, that's some serious speculation on your part. We've made quite some progress since the 80s. For example, neural word embeddings learn which words are synonyms without any input (and google recently release a faster algorithm for doing this called word2vec). There are algorithms for parsing sentences, and numerous databases and ontologies representing manually curated 'concepts'. Google could well be using some of these within it's search. That it doesn't come back and say "that doesn't make sense" might only be because the search is designed to always try to find something, even if it's the wrong thing. That's because it's posed as a ranking problem. In any case, what is intelligence? One of my favourite sayings on this topic is this (and I forget who to attribute this to, but it's not mine): "We will never have artificial intelligent. Every so often we come up with a problem to test for intelligence. When a computer finally beats a human at this problem, detractors are quick to backtrack and claim 'well that's not really intelligence' and proceed to come up with a new test for intelligence." I suspect that this will likely go on for a very long time. In the meantime, we've been using intelligent algorithms for decades already.