What I mean: given enough time, we'd be able to analyze a specific computation (not all real-time computations of such mind). However, our patience, lives and our universe too is finite, so it could set practical limits to our task. Say: decoding X signal would only take me more time than the universe to end, so, that's anyway an impossible task. But we should be able, in principle and with infinite time, to analyze any computation. (Well, we should first set a meaning for "analyze" in this context)