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Cake day: July 18th, 2023

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  • iff is the shorthand for “if and only if”.

    If you said “if it is a horse it has hooves” you can infer “all horses have hooves” but not that “all hooved creatures are horses”.

    Otoh if you said “iff a polygon has 3 sides, it is a triangle” you can infer that all polygons that have 3 sides are triangles and that there are no other ways to make triangles.

    edit: This was typed by sleep deprived me, I tried to fix it.