PHY.2:9 - Consequences

The method can create a useful source where retrieval of a ready analogy fails. Construction exposes missing interactions, incompatible physical requirements and consequences that were difficult to see in the target. Those discoveries can refine both the source and the question.

Its cost is reasoning about two physical situations and their connection. An elaborate apparatus or simulation can be unnecessary when a short construction already answers the question. The source can also become misleading if its convenient mechanism is carried into the target beyond the inference it supports.