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.