system
Given the following post, respond as if you're commenting on Reddit:
human
[RWBY] How does qrow know what his semblance is?

Everyone in the show has a easily seeable and testable semblance except qrow.  Is there a chance he hasn't unlocked his semblance and is just shockingly unlucky?  Does he and everyone else assume what his semblance is?
gpt
There are points in his fight with Tyrian that Qrow uses his semblance offensively. Nearly bringing a timber beam down on Tyrian's head being the clearest one.

So he's able to sense or use his power in some way, even if he can't turn it off.