When asking someone a question, they might not give you the initial response that you are hoping to receive.
But are they blocking you?
Are they stopping you in your tracks?
Are they preventing you from moving forward?
If they are coming back with more questions than statements or redirecting towards other topics – chances are they are blocking.
If they are providing well-thought-out explanations that give you an answer to your question (just not the one you hoped for), they are trying to help.
Blockers don’t provide well-thought-out answers that are on topic simply because it takes too much work to do, to provide that information to someone else, to continue moving forward with their problem.