Deliberate ignorance is the practice of refusing to consider or discuss logic or evidence disproving ideologically motivated positions. Related concepts are wishful thinking and the fallacy of invincible ignorance. Examples of deliberate ignorance include:

- materialists refuse to address the impossibility of material explanation for migration and homing
- evolutionists refuse to address the lack of a plausible evolutionary path for the whale and the other counterexamples to evolution.
- Believing that only one ideology could ever make mistakes; constantly demonizing that ideology while ignoring the faults of one's own (a particularly Liberal fault).
- liberals refuse to address how socialism destroys productivity
- Liberals who refuse to acknowledge the many fundamental truths in the Bible and even dismiss out-of-hand the many examples of Biblical scientific foreknowledge but refuse to read the Bible.
- Advocates of the global warming theory refuse to consider any scientific evidence which shows that natural causes have always had a greater effect on terrestrial air temperature than human activity.
- Liberal cafeteria Christians refuse to consider Bible verses that contradict their preconceived notions of what the Bible should say.
- Liberal Internet discussion boards quickly delete posts that present facts contradicting liberal ideology and ban users making such posts.
- Believing sentimental fallacies about public figures even when all the objective facts clearly indicate that said fallacies are false.
- Liberals who claim that the first amendment says that public officials are not allowed to acknowledge America's Christian heritage.
- Pushing a "scientific" theory for political purposes or because it fits one's belief system or preconceived notions, while dismissing actual scientific evidence that discredits the theory [...]