My food log showed that I legitimately ate 3500 calories in a day as a 140-lb individual... but never two days in a row. The second day was always accompanied by unconsciously skipped meals or second helpings, averaging out to 2700 calories per day over time. I didn't even realize I was doing that, I just focused on my habit of finishing an entire bag of Doritos and thought I must be cheating thermodynamics.