An extract from my notes reads that "every boolean law has a dual: any valid statement is also valid with:"
. replaced with +
+ replaced with .
0 replaced with 1 and vice versa.
The Attempt at a Solution
I have no clue what this means. Surely it doesn't mean that you can switch around the + and . in any boolean statement and it will still hold true? Can anyone explain, and what are the implications of it?