It may be applied to mean "one without rationality", for their beliefs or ideas. Or, more precisely, it may mean someone who openly rejects some aspect of rationalism, variously defined. It can be seen as either a negative quality, used pejoratively, or a positive quality: For example, religious faith may variably be seen by some as a virtue which doesn't need to be rational (see fideism), while others (even of the same religious tradition) may view their faiths as being rational, favoring rationalism.