Final answer:
Louise Evans learned from her brother that insisting on always being right can harm relationships and communication. The acronym WAIT signifies 'Why Am I Talking?', a prompt to consider the value of one's contributions to a conversation.
Step-by-step explanation:
In Louise Evans' TED Talk, titled Own Your Behaviours, Master Your Communication, Determine Your Success, she shares an insightful lesson taught to her by her brother regarding the notion of 'always being right'. Her brother emphasized that always insisting on being right can lead to interpersonal conflicts and hinder effective communication. He encouraged her to consider other perspectives and that sometimes the relationship is more important than the individual need to win an argument.
Furthermore, Louise Evans introduces the acronym WAIT, which stands for 'Why Am I Talking?' This acronym serves as a reminder to think before speaking. It encourages the idea of listening carefully and making sure that when one does speak, it contributes meaningfully to the conversation rather than merely expressing the need to be heard or to be right.