You see, I've seen the word "rationalism" used to mean all five of these things at different times:

• The belief that we should come to know the world through reason and experimentation, shunning intuition.
• The belief that we should come to know the world through reason and intuition, shunning experimentation.
• The belief that we should come to know the world through knowledge of (and correction for) cognitive biases, and knowledge of (and correct use of) probability theory.
• Being effective at believing things that are true and not things that are false.
• Being effective at doing things that are good and not things that are bad.

Edited to reinstate that proposed solution, since this discussion is presumably finished.