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Logic  /  Logic 154  ·  Atom · ~20 seconds

Disjunctive Syllogism

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State

p or q; not-p; therefore q. Valid — eliminate one disjunct, the other stands.

Show

The outage is hardware or software. It isn't hardware. It's software.

Watch for

DS works by *denying* a disjunct. Affirming one proves nothing — next video.