When you are talking to somebody it is like music. When we are relaxed our conversations tend to be more in rhythm.
Let me show you what I mean by taking a situation of “saying no”.
“Have you repaired the lamp?” (intonation critical, already sensing it isn’t repaired and going for a “got ya game”, see Eric Berne “Games people play”, provoking a justification, or just being angry about it not being repaired yet whatever the details)
To not justify you can use rhythm. Let’s say you reply: “No, I still got to do this.”
The words in itself could take any form through the intonation from annoyed, justifying, excusing, assertively and so on. But it’s not only about the intonation but also the rhythm.
It’s like the question was a snaredrum before the song ends and the “No” would be the last part of the song as you often see in live music when the whole band ends on the same beat. This would be a way to use rhythm to make a no more powerful or to work with the energy. As for this situation I don’t mean saying it over the top but definitely connected and something like subtly more emphasized, you know haha but yeah that is my picture and my idea is not about faking but about self-expression although it could also be done playfully I guess.
Then you could leave a pause and add “unaffectedly” -since you ended it with the No – “I still got to do it.”