  In addition to this classification of the aims of an argument, there is a more common distinction among arguments in terms of their structure. Broadly speaking, most arguments for miracle claims fall into one of four structural categories: deductive, criteriological, explanatory, or probabilistic. A valid deductive argument is one in which, given the truth of the premises, the conclusion must also be true. A criteriological argument sets forth some criteria ostensibly met by the claim in question and concludes that the satisfaction of those criteria reflects well on the claim—that it is certain, or true, or likely to be true, or plausible, or more plausible than it would have been had it not met the criteria. An explanatory argument is typically contrastive: it aims to show, for example, that one hypothesis is a better explanation of a certain body of facts than any rival hypothesis or than the disjunction of all rival hypotheses. A probabilistic argument aims to show that the conclusion is more probable than not, or that it is more probable than some fixed standard (say, 0.99), or that it is far more probable given the evidence adduced than it is considered independent of that evidence.