Assuming everyone in this kitchen has behaved normally, as far as they can determine. What is the logical explanation for this?
Update: So, after staring at the silent audience for 48 hours, I blink… The wrong hotplate has been turned on, the one the pasta is leaning over when standing in the pot. After enough time the heat makes the pasta burn. In other words, don’t leave the kitchen while cooking pasta. In fact, don’t leave the kitchen while cooking. Period!