numbers and simple equations . I toss in a couple extra visual examples for arrow , time/entropy , etc DO NOT NIT PICK THEM They aren't actually 'used' or necessary' I like them because they add some general vibe to the first page But they are not actually relied on going forward if you want to complain about them then just ignore them. pretend they aren't there they are just superfluous window dressing tone setting I only do this on the first page You wont find this kind of 'fun unused dressing' after page 1 . The only thing of import on page one is numbers and basic math |