Basic Logical Arguments

"A statement or proposition from which another is inferred or follows."

• Premise

• Conclusion

• Valid

• Sound

"A proposition that is reached from given premises."

• Premise

• Conclusion

• Valid

• Sound

A logical argument whose premises necessarily lead to the conclusion, regardless of whether or not the premises are correct.

• Premise

• Conclusion

• Valid

• Sound

A logical argument whose premises necessarily lead to the conclusion AND whose premises are true.

• Invalid

• Unsound

• Valid

• Sound

A logical argument whose premises necessarily lead to the conclusion AND whose premises are false.

• Invalid

• Unsound

• Valid

• Sound

A logical argument whose premises do not necessarily lead to the conclusion.

• Invalid

• Unsound

• Valid

• Sound

If an argument follows the "modus ponens" format, and has correct premises, what will the argument be?

• Invalid

• Unsound

• Valid

• Sound

What is the name of the following format of logical argument?

If A, then B.

Not A.

Therefore not B.

• Modus Ponens

• Modus Tollens

• Law of Syllogism

• Disjunctive Syllogism

What is the name of the following format of logical argument?

If A, then B.

A.

Therefore B.

• Modus Ponens

• Modus Tollens

• Law of Syllogism

• Disjunctive Syllogism

What is the name of the following format of logical argument?

If A, then B.

If B, then C

Therefore, if A then C.

• Modus Ponens

• Modus Tollens

• Law of Syllogism

• Disjunctive Syllogism