# Discrete math Question.Suppose your friend makes the following English statement "If

Discrete math Question.
Suppose your friend makes the following English statement "If $$X \oplus Y$$, but $$\displaystyle\sim{X}$$, then we have Y." Convert it into a statement form. Then show that your friend's statement is valid. Is it true that "$$\displaystyle{X}\oplus{Y}$$, but $$\displaystyle\sim{X}$$" is equivalent to Y?

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Step 1
The symbol $$\displaystyle\oplus$$ represent the $$\displaystyle X \oplus R$$ operation for the terms in binary operation. Therefore, the expression with XOR can be solved using the truth tables.
Step 2
To convert the English statement to a statement, write it in mathematical form by removing if and then. Also remove all other texts in statements. This will give the statement : $$\displaystyle{X}\oplus{Y}\sim{X}={Y}$$.
To check the validity of the statement make a truth table with each entry. The first column will be X then Y followed by the operations.
$$\begin{array}{|c|c|} \hline X & Y & X \oplus Y & \sim X & \sim X \oplus Y & X \oplus Y \cdot \sim X & X \oplus Y OR \sim X \\ \hline 0 & 0 & 0 & 1 & 1 & 0 & 1 \\ \hline 0 & 1 & 1 & 1 & 0 & 1 & 1\\ \hline 1 & 0 & 1 & 0 & 0 & 0 & 1\\ \hline 1 & 1 & 0 & 0 & 1 & 0 & 0\\ \hline \end{array}$$
Step 3
The value of $$\displaystyle\sim{X}\oplus{Y}$$ is not equivalent to Y. Also the value of $$\displaystyle{X}\oplus{Y}\cdot\sim{X},{X}\oplus{Y}{O}{R}\sim{X}$$ are not equal to Y. Therefore, the statement is false.