Non sequitur and Rap on knuckles

Non sequitur noun - A reply that has no relevance to what preceded it.

Rap on knuckles and non sequitur are semantically related. In some cases you can use "Rap on knuckles" instead a noun phrase "Non sequitur".

Non sequitur and rap on knuckles are semantically related. Sometimes you can use "Non sequitur" instead a noun phrase "Rap on knuckles".