(Some philosophers, such as Sydney Shoemaker, have argued that the laws of nature are in fact necessary, not contingent; if so, then nomological possibility is equivalent to metaphysical possibility.)
（有些哲学家，如西德尼·舒梅克（Sydney Shoemaker），争辩说自然规律是事实上必然而非偶然的；如果这样，则法则可能性就是等价于形而上学可能性的。