To me the title reads very differently - it's saying that if you demand certainty you'll wind up treating something uncertain as certain, and hence believing something untrue.

For reference incidentally, the title is a callback to the last line of a previous post[1] by the same author, on an unrelated topic. So it's presumably meant to be less a statement about Ngrams, and more a recurring theme in the author's views on language.

[1] https://www.etymonline.com/columns/post/test