'Ignorance fallacy' is an inefficient expression with various extended meanings. The basic premise is that ignorant people argue from ignorance, which inevitably produces fallacious arguments. 'Invincible ignorance fallacy' refers to a person who refuses to believe an argument, regardless of evidence. The arguments are logical fallacies, because they can't be based on fact. A related situation is the 'argument to ignorance' whereby something is considered false purely because it's unproven, or true because its falsity is unproven.
Examples of Ignorance Fallacy:
|Old version: The Moon is made of green cheese.|
The Sun revolves around the Earth.
The Earth is flat.