[under development]

Normative statements ('You must not kill.') vs. imperatives ('Don't kill!') 

'You should [ought to; must] do x' = 'Do x!'?

Normative statements

The problem of normative statements: @Hume's Law, can you derive 'ought' statements from 'is' statements'? (Lack of clarity with the central terms botches the debate: What exactly is an 'ought statement'? What exactly is an 'is statement'?)

How would normative statements have to be 'formalised'?

o as propositional frames

o as imperative frames

Normative statements may express either (a) natural duties or (b) conventional commitments. (Cf. the distinction between "natural law" and "positive law".) (Same thing with imperatives, of course ...)