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→‎Note 3: try \texttt for cactus syntax
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"Aha!" we say, and think we see the way of things, writing down the rule <math>x' = (x),\!</math> where <math>x'\!</math> is the state that comes next after <math>x,\!</math> and <math>(x)\!</math> is the negation of <math>x\!</math> in boolean logic.
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"Aha!" we say, and think we see the way of things, writing down the rule <math>\texttt{x' = (x)}</math> where <math>\texttt{x'}</math> is the state that comes next after <math>\texttt{x},</math> and <math>\texttt{(x)}</math> is the negation of <math>\texttt{x}</math> in boolean logic.
    
Another way to detect patterns is to write out a table of finite differences.  For this example, we would get:
 
Another way to detect patterns is to write out a table of finite differences.  For this example, we would get:
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