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# double arrow/double not arrow chains

Alum Member
in General 17 karma

Hi I am having some issues with chaining double arrows/double not arrows.

I know that:
A--> B <--|--> C = A <--|--> C
A <--|--> B --> C= A <--|--> C
A--> B <----> C = A <----> C
A <----> B --> C = A <----> C

A <----> B <-----> C
A <----> B <--|--> C
A <--|--> B <--|--> C

Could somebody help clarify this?

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• Member 🍌🍌
edited August 2017 9361 karma

7Sage does not use "The Double-Not arrow" used by PowerScore, so I may be wrong, but I believe PowerScore uses it to indicate "Not both rule."

A --> /B

According to the PowerScore Bibles, "A <--|--> B" only excludes the situation that "A and B both occurs."

@"elroy.mjl" said:
A--> B <--|--> C = A <--|--> C

A --> B --> /C = A --> /C

A <--|--> B --> C= A <--|--> C

I don't think this is right. Again, I don't know what <-|-> symbolizes, but based on my understanding that A <--|--> B = A --> /B
A --> /B --> C = A --> C