Who was placed in the path of a plow by Palamedes to prove his father's sanity?

The character who was placed in the path of a plow by Palamedes to test his father's sanity was actually Odysseus. This incident is part of the clever schemes employed by Palamedes to reveal that Odysseus was pretending to be insane in order to avoid joining the Trojan War. By placing his son Telemachus in front of a plow, Palamedes aimed to demonstrate that Odysseus’s behavior was calculated and not truly mad, since a man in his right mind would not let harm come to his child.

Telemachus, however, does not relate directly to the test of sanity initiated by Palamedes; he was instead the instrument used by Palamedes to prove Odysseus's faculties. This critical moment highlights the wits of Palamedes and the lengths to which Odysseus went to avoid warfare. Therefore, the correct connection is with Odysseus rather than Telemachus.