Has Google's AI learned to recognize the meaning of certain keyword phrases so you lose your rankings if they are added to your page? For example if RankBrain sees you mention a product is the "2017 version" does it derank it in favor of the page on your site that has the "2018 version" even though all the traditional ranking signals are still pointing to the product page for the 2017 version? Does adding certain keyword phrases trigger RankBrain to derank a page?
I'm seeing some weird ranking moves after adjusting the text on pages that do not make sense when you only consider traditional ranking signals. These weird ranking moves would be understandable if you assume Google's AI can recognize & understand certain keyword phrases.
What do you think?