Giving The Flat-Earthers Hope

(At my university, the science building has classroom-style lectures where the rooms are long and have doors on both ends of the room, so you can hear a lot from the hall. I am walking past one class when I overhear one lecture.)

Teacher #1: “…remember that a hypothesis can never be proven true…”

(Next door…)

Teacher #2: “…there was a point in human history where people thought the Earth was flat…”