Sarek's_dilemma.jpg (233 × 174 pixels, file size: 19 KB, MIME type: image/jpeg)
Spock toying with his logic puzzle that he calls Sarek's dilemma. (TOS comic: "When Worlds Collide: Spock Confronts the Ultimate Challenge")
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Sarek's dilemma was a logic puzzle given to Spock by Sarek. He used it to reininforce the rules...