What is Kantianism and sciences of positivism and positivism?

need some help here in my question regarding : How is legitimate science consistent with logical positivism?

Positivism is a philosophical and ontological (what exists) position in which there can be something which is 'positive', 'truthful' or 'known'. It often espouses that there is an external reality...

Auguste Comte http://wiki.answers.com/wiki/Auguste_Comte

is the theory that claims there are no natural law, and therefore no natural right. All human rights, it holds, are derived from the state, from contracts, from each person's freedom, or from custom.

The term 'positivism' has two distinct uses: 1: the form of empiricism that bases all knowledge on perceptual experience (not on intuition or revelation); 2: a quality or state characterized by...