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"Sipser describes how to compute the XOR of the n bits with O(n) gates". Where? If he did that, this would be an trivial problem to answer. So I would like to know where he did that.
YuvalFilmus Does this work: for some clause that has a,b,c. we take the variable (e.g.) and create a new clause: (a v d_x v d_x). d_x is a dummy variable that is forced to be fals
