Epistemology is concerned with the nature, basis and limits of

knowledge. One of the central ideas that philosophers utilise when

exploring these issues is that there is a difference between holding

beliefs for good reasons and holding beliefs – even if they are the

same beliefs – for bad or no reasons. This difference is often viewed

in normative terms: an individual is correct in believing what it is

justified to believe, and incorrect in believing what it is not justified

to believe.