Many years, ago, early morning routine. I needed to go to work, so I just just told my then 3 1/2y old daughter she couldn’t go to kindergarden right now, we go a little later.

Stamping her foot, “Nooooooo, I want to go now”

“Ok, if you insist…”

(That was in the “learning to say no” phase when she said “no” to everything for a time)