Maxperson
Morkus from Orkus
So, that city kid whose closest experience with a forest is the last salad he ate is going to have a working knowledge of forests? That dwarf whose spent his entire life underground understands forests? That acolyte who grew up in a temple in Waterdeep has a working knowledge of forests?
That city kid and acolyte who used to find paths through the trees in the park when he was young? Who used to have stories of children wandering wooded paths told to him by his grandmother? Before you start saying, "But uncle Ernie!!" It's not the same thing as trees are basic aspects of the world and trolls are not. One is all over the place, unless you are in a setting like Athas. One is never going to be seen by 90%+ of the population of the planet.
And a dwarf who never went out onto the mountain and its trees/forests would have sunlight sensitivity like drow have, having spent his entire life in the darkness. So sure, if you want to voluntarily give your dwarf sunlight sensitivity and let me know in your background that you stayed underground your entire life, I'd accept that you wouldn't know about paths in the forests. Of course, you also wouldn't make that declaration to me, knowing that your PC didn't know about paths.
You are aware that if you have to create corner case scenarios like dwarves who have never left the darkness in order to "disprove" basic world knowledge, you've just proven my point, right? Going out of your way to find exceptions to the rule, proves the rule.
Sure. You're not inserting yourself as the Author at all. Nope, not a little bit.
Not at all. I've been arguing this entire thread that things that make sense via background provide knowledge. Pay attention.