Need To Know

Did Rick Perry Fall Victim to Tip of the Tongue Phenomenon?

Clip: Season 2 | 2m 19s

In Need to Know's web series "Presidentiality," we look at Rick Perry's potentially campaign-ending mental block at this week's Republican presidential debate in Michigan, and ask if he may have been suffering from a common cognitive phenomenon known as "Tip of the Tongue."

Aired: 11/09/11

Expired: 11/09/16

Rating: NR

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