If a valid argument has a false conclusion,then not all its premises can be true.

Name: If a valid argument has a false conclusion,then not all its premises can be true.
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This is a basic rule of logic known as the principle of non-contradiction. If a valid argument has one false conclusion, then it must mean that at least one of its premises is false as well, because a valid argument must have true premises and a true conclusion.

If a Valid Argument Has a False Conclusion,then Not All