#2783: Ruling Out
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Transcript
[Cueball is talking to Megan.]
Cueball: So far our astronomy group has published studies ruling out the existence of Earthlike stars, exoplanets in our solar system, habitable-zone quasars, stars with subsurface oceans, and tectonically active black holes.
[Caption below the panel:]
Science got way easier when we realized you were allowed to do studies just to rule stuff out.
(Sourced from explainxkcd.com)
Title text:We were able to replicate and confirm prior authors' detection of a moon orbiting the Earth with high confidence.