[quote=@Codify]
<Snipped quote by Meta>

Hmm. That really depends on what you're dealing with. Mammal, lizard, etcetera... There's rarely things that work on "almost everyone." And what's most useful depends on what you're dealing with. Sorry if this seems obtuse, but it's why having a specific goal in mind is easier than trying to learn "everything."
[/quote]

If I want to be able to solve any mystery, I have to understand how everyone works on the inside. That's my goal.