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I am reading "Causal Models" by Christopher Hitchcock. He frequently uses the phrase "just in case"--is this the same as "if and only if"?

Examples:

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Another example outside the context of definitions:

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  • Can you provide an example of of "just in case" in a sentence? – scoopfaze Dec 06 '19 at 03:16
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    Yes, it appears so. – Hayden Dec 06 '19 at 03:17
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    This seems to be an informal way to give definitions. Many authors, intending informal phrasing, might begin your first example as "$A$ and $B$ are said to be probabilistically independent (with respect to P) when_______." For the final word "when," often "if" is written instead. – Will Jagy Dec 06 '19 at 03:31

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US philosophers (inc logicians) and some US mathematicians use it to mean 'if, and only if.' According to Language Log (2006), the phrase is not thus used in the UK. http://itre.cis.upenn.edu/~myl/languagelog/archives/003470.html

praymont
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