Question: First translate into propositional expressions and then use the rules of equivalence and inference to prove the conclusion. If the program is efficient, it executes

First translate into propositional expressions and then use the rules of equivalence and inference to prove the conclusion.

If the program is efficient, it executes quickly. The program is efficient, or it has a bug. However, the program does not execute quickly. Therefore, it has a bug.

(

use letters E

,

,

)

-

the program is efficient

-

It executes quickly

-

Has a bug

If the program is efficient, it executes quickly. E

- >

The program is efficient, or it has a bug. E V Q

However, the program does not execute quickly.

-

Therefore, it has a bug. B

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