I favor nor Intent nor Chance
And take alike a Mark, or Stain:
Alike the Accidents of Hands,
Or weighty Musings of a Brain.

What am I?

Answer… oh, no, I’m not saying, you have to guess.

Image: a lightly edited version of the delightful photo Question Mark, by Leo Reynolds, published under a Creative Commons  Attribution-NonCommercial-ShareAlike 2.0 Generic (CC BY-NC-SA 2.0) license.