Appeal+to+Ignorance

Appeal to Ignorance- The fallacy that a proposition is true simply on the basis that it has not been proven false or that is is false simply because it has not been proven true. Example: Since you haven't been able to prove your innocence, I must assume you're guilty.

If someone sees a UFO and there is no evidence that it is not aliens, it must be aliens. media type="youtube" key="2Ra8_gyY9R8" height="322" width="536"media type="youtube" key="jx7mvfAK_Ec" width="543" height="312"