During the Kurukshetra war, Yudhishthira announced 'Ashwattama hatha' (Ashwattama is dead) - which was technically true as an elephant named Ashwattama had been killed. However, he added 'kunjaraha' (it's an elephant) so softly that only Krishna heard it. Drona, believing his son was dead, gave up his weapons and was killed, making this a strategic half-truth in warfare.