How Many Angels Can Dance on the Head of a Pin ?

According to WiKi :

"How many angels can dance on the head of a pin?" is now a metaphor for wasting time debating topics of no practical value, or on questions whose answers hold no intellectual consequence when more urgent concerns accumulate. Alternatively, it can be phrased as "How many angels can stand on the point of a pin?" It is used this way in modern contexts; the phrase was originally used in a theological context by 17th-century Protestants to mock medieval scholastics such as Duns Scotus and Thomas Aquinas. Whether medieval scholastics really discussed the topic is, however, a matter of debate. The suggestion is possibly an early modern invention that was intended to discredit scholastic philosophy