or was performing tayammum, then discovered water after having sat for roughly the time needed to recite the tashahhud but before giving the final salam, his prayer—according to them—is invalid. They also maintain that if someone laughs aloud (qahqaha) after sitting for that same length of time, the prayer is not spoiled; he must only renew his ablution. In their school, laughter nullifies wuduʾ only when it occurs during the prayer itself, and the inconsistency of these rulings and their clear opposition to the hadith is plain. From all that has preceded it becomes evident that none of the proofs they cite to classify the act as merely sunnah are convincing. The sound position is that it is obligatory, as affirmed by the majority. Some later Hanafis have adopted this view as well, though they label it wajib in their technical terminology, a degree below fard.