What if the last person needs to respond to what the first person said in a way it'd change what other people said? I mean, I'm not sure if this is a serious id

What if the last person needs to respond to what the first person said in a way it'd change what other people said? I mean, I'm not sure if this is a serious idea or tongue-in-cheek... A: Let's do X B: To do X, we need to Y. C: To do Y, we need to Z. D: We cannot do X because of ... Let's do T instead. (entire 24 hour wasted?)