

That didn’t happen.
And if it did, it wasn’t that bad.
And if it was, that’s not a big deal. <- We are here
And if it is, that’s not my fault. <- Or maybe here
And if it was, I didn’t mean it.
And if I did, you deserved it. <- And I’m pretty sure they used this one already



Depends on the tree species, technically the only living part of a tree trunk is a thin layer of material right under the visible bark. If you go around and expose the wood in a circle around the trunk the tree will die, but I guess if you’re careful the bark can be harvested without harming the tree.
Disclaimer: I am not an arborist, this is just my recollectio of an explanation I got several years ago.