LSAT logical reasoning: conditional logic
The One-Way Door
Every student who completed the seminar received a certificate; Maria has a certificate; so Maria completed the seminar? A three-minute film about the one mistake the LSAT tests more than any other, told with a room, a hall, and a door that opens one way.
This browser has 3D graphics turned off, so the set cannot be drawn. The math and the narration still play.
The problem
Every student who completed the seminar received a certificate. Maria received a certificate. Therefore, Maria completed the seminar. The reasoning is flawed because it: (A) treats a condition sufficient for a certificate as if it were necessary (B) treats a necessary condition as sufficient (C) draws a conclusion about one student from a claim about all (D) presumes what it sets out to prove (E) mistakes a correlation for a cause
