It was very roughly proposed by [[Hume]], and is also known as 'Hume's Guillotine', but later expanded on in much greater detail by Moore. He observed that all moral statemnets, most clearly [[psuedo-syllogisms]], progress using flawed [[implicit logic]]. Take, for instance, the following common argument against [[abortion]]: | It was very roughly proposed by [[Hume]], and is also known as 'Hume's Guillotine', but later expanded on in much greater detail by Moore. He observed that all moral statemnets, most clearly [[psuedo-syllogisms]], progress using flawed [[implicit logic]]. Take, for instance, the following common argument against [[abortion]]: |