McNamara fallacy

It happens when someone continues in a course of action, even if evidence shows that it's a mistake.

Common phrase: "We've always done it this way, so we'll keep doing it this way." "I've already invested so much..."

"We should ignore the theory of evolution because the dictionary says that a theory is just an opinion that you have about something you can't prove."

The person using this fallacy is basing their statement on a specific definition of the word "theory" while

It is the habit of making decisions based on how we feel rather than what we value.

It's when we use our emotions and feelings as evidence for what we should or shouldn’t do. Depression and procrastination are common results of this.