In some conditional constructions, the result is left unspoken because surrounding discourse makes its general force recoverable. Yet an omitted apodosis cannot be reconstructed responsibly without contextual evidence.
لَوْ رَأَيْتَ ذٰلِكَ الْمَنْظَرَ ...
If you had seen that scene ...
The result is deliberately unspoken. A setting of awe might support an implied response of amazement; a frightening setting might support alarm. Without such information, no one particular completion is established. The rhetorical effect may be open-endedness itself, rather than a uniquely identifiable missing clause.