If S knows p, and S knows that p entails q, then S knows q. See Cartesian skepticism . <Discussion> < References > P. Mandik
KNOWLEDGE UNDER KNOWN ENTAILMENT, PRINCIPLE OF CLOSURE OF
Meaning of KNOWLEDGE UNDER KNOWN ENTAILMENT, PRINCIPLE OF CLOSURE OF in English
English dictionary of philosophy of mind. Английский словарь философии сознания. 2012