Naturalistic Fallacy: Moore's Open Question
G.E. Moore's critique of defining moral properties in natural terms. The open question argument: even if 'good' is defined as 'pleasure,' it remains meaningful to ask 'But is pleasure really good?' This suggests 'good' is not identical to natural properties.
Real World
When Bentham defined 'good' as pleasure, Moore's challenge applies directly: even satisfied prisoners in a pleasure machine might prompt us to ask 'But is that life really good?' — showing pleasure and goodness are not identical.
Exam Focus
State the open question argument precisely: show why 'Is X really good?' remaining open proves 'good' cannot be defined naturally.
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