Plausibility Theory

Plausibility Theory is that province of logic which describes and formalises the way we reason, or we think we ought to reason, about plausibility. In precisely the same sense, well-known deductive logic describes and formalises the way we reason about truth. There are many mathematical similarities between plausibility theory and the various probability theories that stroll and limp around. But its strength lies in its meaning and its interpretation; and on this account it is intimately related to Bayesian probability theory.http://www.diva-portal.org/smash/get/diva2:12252/FULLTEXT01.pdf