To paraphrase, if a contradiction might be proved in Peano arithmetic, then set idea could well be logically inconsistent. With this definition, provided a natural variety n, the sentence "a established S has n elements" is often formally described as "there exists a bijection from n to S. Bea BonmotBea https://buyherbalmedicines.finance.blog/2025/09/03/shop-herbal-medicines-online-cureayu-ayurvedic-products/