Someone has made an inaccurate edit to this article here:
http://en.wikipedia.org/w/index.php?title=...oldid=186851442
Of course 'omne A est P' means every S is P, since it is singular. The form 'All S's are P' (plural 'all') is often seen, but is incorrect. If someone who hasn't been blocked or banned could revert this, I would be very grateful.
Peter