So here is my question....is every single technique that every single student does in your dojo guaranteed to be martially effective every time they throw?
I guess you're saying that the answer is so obviously 'no' that the question can't be asked earnestly. If then the answer to Mary's question is indeed no, it must be that some techniques you learn are martially effective and some aren't.
Well, no, that doesn't follow at all. The question was stated in terms of absolutes: 'every single technique, "every single student...in your dojo", "guaranteed to be martially effective", "every time". There is no technique, in any style, that meets that standard.