Debate at the high jump

Michael was off having fun inside a giant pine tree. I was reclining against the Fat Mat - the one they bring out once the bar gets up towards a metre. At this early stage the athletes were leaping onto the Flat Mat.

Someone else's 4 year old, on top of Fat Mat, to me: This will be finished soon.
Me: Well, it might not. Usually the high jump takes a long time.
SE4YO: No it doesn't.
Me: Yes it does.
SE4YO: No it doesn't.
Me: Yes it does.
SE4YO: No it doesn't.
Me: Yes it does.
SE4YO: No it doesn't.
Me: Yes it does.
SE4YO: You're not the prime minister
Me: No, I'm not.
SE4YO struts away triumphantly.

[25 minutes later]
SE4YO, back on top of Fat Mat: You were right.
Me: Yes, I was.
SE4YO hugs my head.