If asked I would say that my approach to parenting is "experiential." That is, I make decisions based on what I observe, along with some intuition and instinct.
If my girls are jumping on the bed and being nutso and you ask me if they are sick, I would respond, no. That is not to say that I would not feel their keppies (Yiddish for head) to check. (Good thing I did on Sunday, too, AK ended up having a fever.)
Going further, if my kids are sleeping peacefully and I think they might have a fever, I wouldn't wake them to confirm. I think the fact that they are sleeping is a better sign than a thermometer's reading.
Yesterday the girls did have runny noses, but they also had a great time. As LP said, "This is special that I am staying home with you because I am sick mommy." I checked each of their temperatures once during the day, just for the record, and they were both in the low 99s. The fact that they ate and bounced and drank, all led to conclude that they were a-okay.
Today they are both back at day care. They are less experiential than I am, more science based. I am hoping not to get a phone call request for pick up, but I am not counting it out.