Tarski's theorem about choice.  Two more definitions of Fin1.
dffin3-2
toward 1a2
tighten dffin3-4 a bit
fin1a2 finished at last
remove three proofs that duplicate set.mm proofs
reorganize comments, remove a few stale long ones
drop the attic
kick out IWBNIs to another file.  sorear.mm is now pure proofs, and <80ch lines
Add missing description comments
pull one lost date out of git