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Logical Fallacy
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Logical Fallacies:
Contradictory Premises
Contradictory Premises
(also known as logical paradoxes)
Instances in which conclusions are drawn from two premises that contradict one another, and cannot be included together because their definitions exclude one another
or
propositions that assert and deny the same thing
*Contradictory Premises may be misleading because the logic may be correct in constructing the argument. The reader must detect the incompatibility of the premises to identify the fallacy.
Non-Examples
Examples
Contradictory Premises tend to get pretty tricky, so pay close attention
#1.
"If God can do anything, can He make a stone so heavy that He won’t be able to lift it?"
"Of course"
"'But if He can do anything, He can lift the stone"
"Yeah, well, then I guess He can’t make the stone."
"But He can do anything."
#2. "The human brain ignores boring presentations. Therefore, a boring presentation was created by a human without a brain.”
#3. A father trying to convince his child that no one should be trusted.
#1:
Bill is a good kid; he never misbehaves.
#2:
All men are created equal. Therefore, every man is entitled to the right to vote.
#3:
If an irresistible force is applied to a movable object, the object will move.
Examples (Continued)
#4:
When the Declaration of Independence was written, delegates idealized that all men were created equal... except for African Americans and Native Americans that threatened the colonists' livelihood. Therefore, only white men should have been able to vote.
#5:
Nobody should possess firearms... except for government officials and soldiers.
#6:
If an irresistible force is applied to an immovable object, the object will not move.