Oddly Wired
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identity

You are more likely to trust a stranger if they share your birthday.

Implicit egotism is a controversial hypothesis proposing a subconscious preference for self-associated stimuli, but it has not been conclusively proven or reliably replicated.

The claim presents an debated psychological theory as a proven demonstration.

Your preferences are not as unique as you think; they are reflections of your own history.

Where this comes from

Study
Pelham, Mirenberg, and Jones, 2002, Journal of Personality and Social Psychology
What the check found
Implicit egotism is a controversial research area, not a settled fact; major findings have failed independent replication and are widely debated in the field.
Confidence
Solid, with limits
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Related

One of these every day, and every one names the study it came from. When a finding is contested, it says so.