Assertion: gunpowder's use | /r/HasProperty | vague
Facets:
Source sentences:
text: Gabor Ágoston and David Ayalon note that the Mamluks had certainly used siege cannon by 1342 or the 1360s, respectively, but earlier uses of cannon in the Islamic World are vague with a possible appearance in the Emirate of Granada by the 1320s and 1330s, though evidence is inconclusive.
text: Gabor Ágoston and David Ayalon believed the Mamluks had certainly used siege cannon by the 1360s, but earlier uses of cannon in the Islamic World are vague with a possible appearance in the Emirate of Granada by the 1320s and 1330s, however evidence is inconclusive.