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Michael_J_Joyce
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Michael_J_Joyce
Tuesday, Jun 10

I felt so good about necessary vs sufficient until the ninja turtle relationship. For some reason that one keeps throwing me off.

Correct me if I'm wrong:

Subset: Turtles

Superset: Ninjas

Being a turtle is sufficient to be a ninja.

So as a turtle you are necessarily a ninja...

But it is not necessary to be a turtle to be a ninja.

Being a ninja is necessary to be a turtle.

But not all ninjas are turtles.

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