It is an intentionally false statement stated without qualification that it should not be taken as true. It is not ignorance as the author knows what (logical)

It is an intentionally false statement stated without qualification that it should not be taken as true. It is not ignorance as the author knows what (logical) qualifications are as the statement itself starts with the qualification "All" and the statement alone is false with no preceding context. To not make it false, it could be further qualified with "Almost" at the start, or use "Most" instead of "All".