This is a "conditional compound proposition", which includes two parts: the antecedent-the topic; The last part-conclusion. The true value of this proposition (that is, whether it is correct or not) does not depend on its conclusion, but on the relationship between its conclusion and the topic. Finally, the combination of the two values determines the truth of the compound proposition:

Title = truth, conclusion = truth, then proposition = truth;

Title = true conclusion = false, then proposition = false;

Title = false conclusion = true, then proposition = true;

Title = false, conclusion = false, then proposition = true;

This topic assumes that 3 = 5 is false and conclusion: 5 = 7 is also false, so the compound proposition is true.