I remember in 3rd or 4th grade I felt sure I knew how to read a clock (then usually analog) until the teacher started a formal classroom unit to teach us. I rea

I remember in 3rd or 4th grade I felt sure I knew how to read a clock (then usually analog) until the teacher started a formal classroom unit to teach us. I realized that I had only understood how to read the hour hand but not the minute or second hands. Illusion of competence or illusion of depth or something.