Exercise prove without deduction A B C B A C SolutionC The q

Exercise prove without deduction A (B C) B (A C)

Solution

C) The question says that RHS is provable from LHS

LHS says that either B is false or C is true then the bracket thing is true and if bracket thing is true than either A has to be false because bracket thing gets true anyhow

RHS says that either A is false or C is true then the bracket thing is true and if bracket thing is true than either B has to be false because bracket thing gets true anyhow

Thus LHS helps in proving RHS

d) LHS says the statement is true means either A is fasle or B is true and same thing is conveyed by RHS