I can't know precisely how good of a filter it is but I'm not interested in finding out a definite figure. I have read enough great stuff from picking up a boo

I can't know precisely how good of a filter it is but I'm not interested in finding out a definite figure. I have read enough great stuff from picking up a book from 300 BCE or so and I've seen enough BS ghost written flavor of the month non-fiction to know it's good enough heuristics to suggest it in this forum.