Albert Einstein stated that "as far as the laws of mathematics refer to reality, they are not certain; and as far as they are certain, they do not refer to reality."
Albert Einstein menyatakan bahwa "sejauh hukum-hukum matematika merujuk kepada kenyataan, maka mereka tidaklah pasti; dan sejauh mereka pasti, mereka tidak merujuk kepada kenyataan."