In ighrāq, the event remains rationally conceivable but lies beyond customary occurrence. The description goes well past ordinary expectations without necessarily becoming contradictory.
For instance, a claim that a host continues to honour a former neighbour wherever that neighbour travels may be imaginable, but it greatly exceeds ordinary social practice.
One must not label a claim ghulūw merely because it is highly improbable. What exceeds custom and what contradicts reason are separate categories.