Do you guys use the double not arrow that the PS LR Bible is talking about? I haven't yet stumbled upon a lesson where JY talks about it so it doesn't look like he's particularly fond of it. I personally find it quite confusing. Is the same as /A (-) /B?

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3 comments

  • Thursday, Sep 18 2014

    OK awesome, thanks a lot!

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  • Wednesday, Sep 17 2014

    Double slash is part of if but only if if I remember correctly. A (-)B is equivalent to /A (-) /B.

    Here is the lesson http://classic.7sage.com/lesson/advanced-bi-conditionals/

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  • Wednesday, Sep 17 2014

    JYPing discusses it in length under advanced logic such as 'or but not both' relations.

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