But in the early stages you can eat thosands of calories a day and still lose weight.
Phrased that way, "you", means anybody. Even Atkins' website makes no such claim, depending on how much you mean by "thosands". Reading
Atkins' "someone" as "anyone" pegs it at 1800 to 2000.
IMO freedumb2003 in comment
#5 is right.
(lower Calories )+ (exercise) =weight loss.