Black Friday: lifetime access is on a special offer in the app, until November 30. Black Friday: special offer on lifetime access, until November 30. Download
논리학에서 이접은 두 명제가 동시에 참일 수 없음을 나타냅니다.nonrihakeseo ijeopeun du myeongjaega dongsi chamil su eobseum-eul natanabnida.In logic, disjunction indicates that two propositions cannot be true at the same time.