>>1107636 Alright, don't answer me, then.
The best defense against bears is to not get into a situation where one outs trying to fucking murder you. Avoid its cubs at all costs, don't leave your food out, and watch for reports of problem bears.
Best defense against black bears is being loud. They're skittish scavengers, and if one shows up, looking big and scary will do the trick. Brown bears will fuck you up and are the ones they say to play dead with. Curl up into a ball and wait for it to get bored and leave.
If you decide on being an idiot and provoking these 500 pound death machines, though, then bear mace is your best bet for pissing them off enough to leave you alone (if you weren't a dipshit and got near the cubs). It can also work against humans, but courts tend to frown on that.
As far as humans, carry a knife. A big fuckoff one on your belt for maximum deterrence, or a folding one in your pocket for utility and better weight.