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
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