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knowledge and wisdom

53 out of 94
(v) to reason methodically. Origin: L ration, reason What are now termed 'detective stories' were earlier called 'tales of ratiocination.' Can you spot the error in this ratiocination? Let x=0. So, x(x-1)=0 => x-1=0 => x=1 =>0=1. Well, the error lies in the second step. If x=0, we cannot write the second equation because it is just another way of writing x-1 = 0/x, that is, 0/0. Division by 0 is not allowed.