Its generally considered a snitch move to tell on someone for coming in late and so its likely that the coworker was angry and upset when it happened
Context: "I couldn't believe that my coworker told my boss that I came in to work 15 minutes late this morning. "
Hypothesis: I was totally pissed off when my coworker tattled to my boss that I came in 15 minutes late this morning
Based on the context, is the hypothesis true, false, or unknown?