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I'm trying to make sure I understand entailment properly, but my prof basically said two sentences that only briefly explained what entailment is, and he's not teaching this course with a textbook.

In this example:

(a) The dog was fed

(b) Johnny fed the dog a treat

Does sentence (a) entail sentence (b), or is it mutual entailment? I don't think it's mutual because the dog being fed doesn't necessarily mean that Johnny was the one who fed it. A similar example was this:

(a) The children were served candy for dinner

(b) The children ate candy

Am I overthinking it to wonder if the children being served candy doesn't necessarily mean they ate candy?

Finally:

(a) John and Susie love each other

(b) John loves Susie

I think sentence (a) entails sentence (b), but I wonder if they contradict each other.

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  • 2
    Your answer is fine.
    – Greg Lee
    Mar 1, 2018 at 4:29
  • You are right about everything, about the third question, John can love Suisse independent of Suisse loving him Mar 1, 2018 at 10:16

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