Notes
This is exactly how the discussion went.
Me: Chris, how many miles do you and Kailey do on these trail runs?
Chris: Oh, 10 to 12.
Me: Okay
At mile 5
Me: How much farther do you want to go?
Chris & Kailey: Let's go to the creaky bridge.
At the creaky bridge:
Me: Do you realize we are at mile 7.5 and we have to get back. That would make 15 miles.
Chris & Kailey: Oh, we don't do math anymore.