Assertion: argument's form | /r/HasProperty | valid
Facets:
Source sentences:
text: A form of argument is valid if and only if the conclusion is true under all interpretations of that argument in which the premises are true.
text: Since the validity of an argument depends solely on its form, an argument can be shown to be invalid by showing that its form is invalid.
text: 9) true; but this is useful only if you know which argument forms or argument patterns are valid ones.
text: The form of the syllogism is valid (modus tollens), and the premises are true.
text: Her point is that it makes no sense to contrast "valid" and "invalid" reasoning unless it is possible for some forms of reasoning to be valid.