Quote Originally Posted by 21forme View Post
It is, but not in isolation. It's not something most people would have the time or expertise to evaluate on the fly. That's why there are tables and indices to tell you what to do.
I do. This can be refined beyond indices. I would add that most players wouldn't know exact indices of A7 or A6 v 2. Suffice it to say simple rule of thumb suggests higher TC required for lower second player card. The unknown regaled system would refine this a bit further.

I really don’t like A6 v 2, but A7 v2, under proper circumstance, will draw a comment akin to - hmm, that’s a risky double, slowly putting the chips on the table. Of course, QTC is a factor.