Can Someone be Simply "An Agnostic?"

[One Above All]

Er, what? You're not asking them to give a truth value when you ask their opinion? Those are effectively the exact same thing. If you ask me to give my opinion on something, I'm going to be assigning what I think to be the case about it.

...And do you think that your opinions are always true, or that they're just your opinions and may be wrong?
There's a difference between holding an opinion and believing it to be true; hence the labels "agnostic" and "gnostic" when it comes to religious belief or lack thereof.