Logic / Unit 5 Logic 206 short lesson, about 20 seconds
Associativity
Captions available
The idea
(p ∨ q) ∨ r :: p ∨ (q ∨ r), and likewise for ·.
In practice
Regrouping within the same connective is free.
Where people slip
Same connective only. Regrouping across a mixed formula needs Distribution — next video.
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