[Kalium]

In vernacular usage, the act of lying requires intent. Is it perhaps possible that Parent is trying to communicate a difference between intentional false statements, commonly called lies, and unintentional false statements, commonly called being wrong?

If someone is incorrect about the time when you ask, it's possible they are deliberately misleading you. It's also possible they are not, and their clock is also incorrect. Would you consider both cases to be lying?