Took it once and was very conservative on words I didn’t “know”. Got 49% with no false positives. Upon inspection if I’d answered yes to everything I thought was a word, I’d have gotten much higher with no false positives. So I took it again and answered yes to everything I could guess the meaning of and got 89% with no false positives.

An example of something I said yes to on the second pass that I’d have said no to on the first: I guess superexcellent is a word, the meaning is very clear but I don’t know that I’ve ever seen it used before and would never consider using it myself.