Not quite as ridiculous as the title sounds, I hope.
3 year old has a cold, snotty and sleepy but no temperature. Due at nursery 8-2 tomorrow. Which I think is a rather long day when they're not feeling 100% and would rather keep home for some cuddles and naps.
However 8 year old has a hospital appointment tomorrow, I really don't want to rearrange. If I keep 3 year old home, they will have to come with us to the appointment and potentially spread germs around hospital. If I send 3yo to nursery there's a chance they'll develope a temp and nursery will call to collect while I'm an hour away at the hospital.
Yabu: Send 3 year old to nursery, it's just snot.
Yanbu: Keep three year old home and take them with you.