Valid →
An argument in which it is necessary that, if the premises are true, then the conclusion is true.
Invalid →
An argument in which it is not necessary that, if the premises are true, then the conclusion is true.
Strong →
An argument in which it is probable (but not necessary) that: if the premises are true, then the conclusion is true.
Weak →
An argument in which it is not probable that, if the premises are true, then the conclusion is true.
Sound →
A valid argument with (all) true premises.
Cogent →
Inductive. strong argument. with (all) true premises.
Statement →
A sentence that is either true or false.
Unsound →
An argument that is either invalid or has a false premise.
Uncogent →
An argument that is either weak or strong with at least one false premise.
Deductive logic →
The part of logic concerned with the study of methods of evaluating arguments for validity and invalidity.
Inductive logic →
The part of logic concerned with the study of methods for evaluating arguments for strength and weakness.
Logic →
The study of methods for evaluating whether the premises of an argument adequately support its conclusion.
Argument →
A set of statements where some of the statements, called the premises, are intended to support another, called the conclusion.
