By any "Call Shot" ruleset (not call all the detail bar rules, but rather... organized rules for professionals and amateurs like the WPA, BCAPL, and VNEA), then it was well within your right to clarify which ball they were playing since the 15-ball was in play. It was also within your right to ask them to clarify which pocket. So, they have at this point called ball and pocket. That fulfills your opponent's requirements for calling a non-obvious shot: ball and pocket. Provided he contacts his set of balls first, which in your explanation... he does.In this case, my opponent is shooting the 10 ball into the corner pocket. The 15 ball is partially blocking the 10 ball. He calls out “10 ball”, at which point I ask which pocket. He tells me the corner pocket, then proceeds to completely miss the 10 ball. The cue ball caroms off the 15, then nudges the 10 ball into the pocket.
This is where you threw yourself into a state of confusion. It has no bearing if he intentionally combo'd the 10-ball or not. He fulfilled his requirement, and he doesn't have follow an intended path for the balls. This doesn't happen often, but when it does, you actually have no reason to ask if he intentionally did anything. He called the ball and pocket, and after he shot, the ball went into the pocket. He continues. You have no right to "call him off the shot," etc.I asked him “Did you intentionally combo the 10 ball?” He replied “I call my ball and pocket - doesn’t matter how it got there.”
I didn’t argue, and I didn’t call him off the shot when he answered my first question.
Is that clear?
The wording of "non-obvious shots" is exactly what happened to you. Your opponent was shooting a non-obvious shot, and you asked for clarification. A player should be calling ball and pocket any time he is shooting at a combo or carom, but he only needs to call the ball and pocket.