The meaning of information involves continuous discussion among rationalists in the field of epistemology. The old style definition, depicted however not decisively embraced by Plato, determines that an announcement must meet three criteria so as to be viewed as information: it must be defended, genuine, and accepted. Some case that these conditions are not adequate, as Gettier case models purportedly illustrate. There are various options proposed, including Robert Nozick's contentions for a necessity that information 'tracks reality' and Simon Blackburn's extra prerequisite that we would prefer not to say that the individuals who meet any of these conditions 'through an imperfection, defect, or disappointment' have learning. Richard Kirkham proposes that our meaning of learning necessitates that the proof for the conviction requires its reality.