Larry, much of this is from your "Common sense and the Diallelus", but made a bit more encyclopedic and with less detail on Reid's views. I think it makes a better ad-hoc link with the one-word title. You might want to edit your article on Reid to cross-link them, and I will produce a more detailed treatment of Popper. I am also of mixed mind as to whether "diallelus" should be capitalized.