WarrantsWarrant may be conclusive or defeasible, and backed a prioriBackinga priori or a posterioriBackinga posteriori. These distinctions yield a fourfold classification of warrantsWarrant: conclusive a priori, defeasible a posterioriBackinga posteriori, defeasible a priori, and prima facie conclusive a posterioriBackinga posteriori. Each is non-empty and the factors determining connection adequacy are different for each class. Conclusive a priori and defeasible a posteriori warrantsWarrant are commonly admitted. An argument inferring a value judgment from a value-relevant property instances an a priori defeasible warrantDefeasible Warrant. If observing F’s which are G’s under comprehensive conditions which might yield counter examples but do not, the warrantWarrant licencing x is a G from x is an F is conclusive a posteriori. The inference from “x is a whale” to “x is a mammal” is conclusive, since “All whales are mammals” is a taxonomic truth, but constructed on observed evidence. The warrantWarrant of a convergent argument may have mixed backing. If the inference from one premisePremise of a convergent argument to the conclusionConclusion is conclusive, the argument is conclusive. We conclude the chapter by contrasting our typology with those proposed by others.