Ottawa Resident Creator and Mod of https://lemmy.ca/c/ottawa

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Joined 4 years ago
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Cake day: May 2nd, 2021

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  • Your example is incorrect.

    • All cats are peanut butter (c is a subset of p)
    • some peanut butter are dogs (p intersects d, or, d is a subset of p)
    • some cats are dogs (c and d intersect, or, d is a subset of c)

    The first two do not make the third.

    You can have:

    • c is a subset of p,
    • d and p intersect,
    • The section of p that intersects with d does not contain any c

    To fix this, reverse the first statement.

    • All peanut butter are cats (p is a subset of c)
    • some peanut butter are dogs (p intersects d, or, d is a subset of p)
    • some cats are dogs (c and d intersect, or, d is a subset of c)

    Any portion of d that intersects with p (some p is d) must also be c (since all p is in c). Hence some c, but not all c, is in the portion of p that intersects with d (some c is d).






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