T'plana-hath

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T'plana-hath
Species: Vulcan
Gender: female
Home planet: Vulcan

In the Star Trek fictional universe, T'plana-hath was a noted philosopher in Vulcan history (regarded as the "Matron of Vulcan Philosophy"). Her most famous quote is "Logic is the cement of our civilization with which we ascend from chaos using reason as our guide." The T'plana-hath, the Vulcan survey ship which made official first contact with Earth (in the film Star Trek: First Contact), was named in her honor.

In the film Star Trek IV: The Voyage Home, Mr. Spock undergoes a memory test in which he is quizzed on, among other things, his knowledge of T'plana'hath and her works. Captain Jonathan Archer, who visited Vulcan decades earlier, is also tested on his knowledge of T'plana-hath.