KindLogicallyCustomarily
TablīghPossiblePossible
IghrāqPossibleExtremely remote
GhulūwImpossibleImpossible
The distinction classifies the degree asserted. It must be assessed from the content and context, rather than from the mere presence of emphatic vocabulary.
The artistic acceptability of ghulūw is a separate question. Logical impossibility does not automatically erase the aesthetic intention of a poetic image.