Mashhūrāt gain acceptance through communal reputation, convention or shared evaluation. Maqbūlāt are linked more directly to confidence in a particular source.
“This community regards keeping promises as commendable” describes a widely recognized social judgment.
“A trusted mentor has explained the harms of breaking promises” gains initial force from the mentor’s authority.
Neither popularity nor respected attribution automatically proves a proposition. These are different reasons for audience acceptance.