Schlick's ethical positivism

Schlick's Problem of Ethics (1930) can be seen as an attempt to accommodate ethics within the framework of logical positivism. If we know the meaning of a proposition whenever we are able to indicate the circumstances which w ould make it true or false, our moral sentences are meaningless. But it is a fact of experience that human beings make valuations and act upon them. I n so far as they can be investigated, values and value judgements are there fore nothing but facts. Thus, Schlick's factual ethics sets out to explain norms according to the laws of the human behaviour.