Logic / Unit 4 Logic 117 short lesson, about 20 seconds
The Five Connectives
Captions available
The idea
Five operators build every compound: ~ (not), · (and), ∨ (or), ⊃ (if-then), ≡ (if and only if).
In practice
The overview card — this frame is the unit's reference screenshot.
Where people slip
Five is enough. Every English connective, however ornate, compiles down to these.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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