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When you say "math", I assume you mean more than just listing objects/states and that you want at least one algebraic operation on the set. The set of states "light on", "light off" does not have an algebraic operation. To include at least one operation, you might consider "change light". But then, two "change light"s in a row would give you "don't change light". And that is the zero in binary arithmetic.fresh_42 said:But we do even more by using the zero: light on - light off - radio on - radio off - pc on - pc off - ...
Whether you write it down or not, it exists and is the only correct answer to 1-1=?Alanay said:Calculating 1-1 does not require you to write it down. You can still calculate at least the simplest of math without 0 obviously, but since you say "Really?" it seams you don't believe that. Try 1+1 or 11+21...