«فَرْضًا فِي الْمَاضِي مَعَ الْقَطْعِ بِانْتِفَاءِ الشَّرْطِ»
A condition is posited in the past while its nonoccurrence is taken as settled.
The word farḍ is central: a speaker supposes an event for argument rather than affirming it actually occurred. The statement displays a counterfactual relation, not merely a historical report.
In «لَوْ جِئْتَنِي لَأَكْرَمْتُكَ» (“Had you come to me, I would have honored you”), the coming is contemplated as an unrealized condition. The understood absence of honor is commonly conveyed through context and the chosen conditional construction.