Discuss one instance where you didn't perceive what your sensory receptors detected. WHY do you think this was the case? Be sure to mention what type of top-down influences affected this experience.

Whether you're posting or replying, your contribution should be at least three sentences and contain original thoughts -- replying just to say "me too" or "I agree/disagree" will not count to earn points. Be sure you are contributing substance relevant to the topic.