# Logic π

**gernreich**#1

**palmercr**#5

Where are the complements. E.g. is not A the square to the left of A or the square above A?

**gernreich**#6

A is horizontal i.e. The lower half of the largest square

B is vertical i.e. The right hand side of the largest square

**henryhbk**#8

Give this post a few moments and it will get derailed into pretty much any topicβ¦ So all answers are rightβ¦

**gernreich**#17

I can try what is the bar symbol over some letters are they NOT? Is the plus sign OR ? If two letters are next to each other is it AND? What does +0 mean?

Thanks

Oh duh!!! That is not a different puzzle! It is the same one Doh!!

**n_s_clements**#19

Yep:

βmultiplicationβ = AND

"addition" = OR

"overbar" = NOT ( Note an apostrophe is also sometimes used for NOT )

β1β = TRUE

"0" = FALSE

Then, the basic rules:

X AND X = X ( XX = X )

X AND NOT X = 0 ( XXβ = 0 )

X AND TRUE = X ( X 1 = X )

X AND FALSE = FALSE ( X 0 = 0 )

X OR X = X ( X + X = X )

X OR NOT X = TRUE ( X + Xβ = 1 )

X OR TRUE = TRUE ( X + 1 = 1 )

X OR FALSE = X ( X + 0 = X )

After that, it works just like "ordinary algebraβ!