Is this rule correct?
For this formula "if ... had done/been Y + someone would/could/might/should not have done/been X", if the context shows "someone didn't do X", then the if-clause implies "even if"; if the context shows "someone did X", then the if part is just a plain if-clause.
Conversely, if the context shows "even if" is implied in the if-clause, then someone didn't do X; if the context shows no "even" is implied in the if-clause, then someone did X.

Is this rule correct?
Thank you.

Question

Is this rule correct?
For this formula "if ... had done/been Y + someone would/could/might/should not have done/been X", if the context shows "someone didn't do X", then the if-clause implies "even if"; if the context shows "someone did X", then the if part is just a plain if-clause.
Conversely, if the context shows "even if" is implied in the if-clause, then someone didn't do X; if the context shows no "even" is implied in the if-clause, then someone did X.

Is this rule correct?
Thank you.

Answer

Is your questions regarding if/then or a math problem?

Example 1: If A had done something to B, then B might not have done it to A, but A did not do anything to B, in fact, we do not know who did that to B.

Example 2: If A would have done something to B, if B was in the room.

Example 3: If B had done something it, then it happened.