I think you misunderstood. I definitely critically question my ideas. But when I'm done questioning, and if I don't have any criticisms of the idea, then it's unrefuted, and I act on it.
How is knowledge different than ideas?
Knowledge is facts, information, and skills acquired through experience or education; the theoretical or practical understanding of a subject.
"A thirst for knowledge"
Synonyms: understanding, comprehension, grasp, grip, command, mastery, apprehension;
"They did it without his knowledge".
An idea is a thought or suggestion as to a possible course of action.
"recently, the idea of linking pay to performance has caught on"
Synonyms: plan, design, scheme, project, proposal, proposition, suggestion, recommendation, aim, intention, objective, object, purpose, end, goal, target
I can't believe I have to explain the difference between knowledge and idea.