unconscious lack of acknowledgement of something that is obvious to others*1 pointrepressionrationalizationdenialcompensationprojection

The term that best fits the description "unconscious lack of acknowledgement of something that is obvious to others" is denial.

Explanation:

Denial is a defense mechanism that involves a refusal to accept reality or facts, thereby allowing a person to protect themselves from uncomfortable truths. In this context, it refers to an individual being unaware or refusing to acknowledge certain truths that are apparent to others, which is characteristic of denial as a psychological strategy.

In contrast:

• Repression refers to unconsciously blocking out painful thoughts or feelings.
• Rationalization involves justifying behaviors or feelings with logical reasons, avoiding the true explanation.
• Compensation refers to overachieving in one area to compensate for failures in another.
• Projection involves attributing one’s own unacceptable feelings or thoughts to someone else.

Thus, the most appropriate choice here is denial.