Appeal to Ignorance

This fallacy occurs when you argue that your conclusion must be true, because there is no evidence against it. This fallacy wrongly shifts the burden of proof away from the one making the claim.

Examples:

1. Him: "C'mon, hook up with me tonight." Her: "Why should I?" Him: "Why shouldn't you?"
2. Since you haven't been able to prove your innocence, I must assume you're guilty.
3. You know that scientists can't prove that UFO's do not visit the Earth, so it makes sense to believe in them.
4. Even the atheist Freud admitted that the existence of God can't be disproved. So we have good reason to continue to believe in him.
5. I guess I didn't get the job. They never called me back.
6. She hasn't said she doesn't like you, right? So she's probably interested. Call her up.
7. Why are you always so skeptical of ESP? Can you prove it doesn't exist?
8. Since all who have tried to prove freedom of the will have failed, we are safe in assuming we are not free.
9. I thought I had every reason to think I was doing fine leading the group; no one complained.