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We're given: The Ridge fire is lit. Rule 3 states "If the Mill fire is lit, the Well fire or the Ridge fire is lit"

- Since it's an "or" statement, only one of the conditions (Well or Ridge fires being lit) need to occur. The Ridge fire is lit, so why would we not be able to tell that the Mill is lit or unlit?

Thanks!

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  • User Avatar
    Kevin_Lin Instructor
    Thursday, Oct 8

    It comes back to this idea:

    "If A, then B."

    Let's say we know B is true. Does that prove anything about A? Do we know that A must be true?

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