A hypothetical examination policy says: “Every registered person may sit the examination if they have identification; suspended persons may not enter.” Khalid is registered and has identification, but his suspension remains active.
Stage 1: Generality initially includes Khalid.
Stage 2: The condition of identification is satisfied.
Stage 3: The exception or impediment of suspension still blocks permission.
This shows why a true starting premise does not settle a case when a relevant exception or impediment applies.