Affirming a Disjunct
This video presents the same text shown beside it, spoken and on screen. It adds nothing the text does not say.
State
p or q; p; therefore not-q. Invalid.
Show
He's a veteran or a teacher. He's a veteran. "So he's not a teacher" — inclusive or: he may be both.
Watch for
DS's evil twin. It secretly upgrades ∨ to exclusive-or without paying for it.
Builds on
Unlocks
- Nothing yet depends on this.