Inferences and Metainferences in ST

Resumen:
In a recent paper, Barrio, Tajer and Rosenblatt establish a correspondence between metainferences holding in the strict-tolerant logic of transparent truthST(+)and inferences holding in the logic of paradoxLP(+). They argue thatLP(+)isST(+)'s external logic and they question whetherST(+)'s solution to the semantic paradoxes is fundamentally different fromLP(+)'s. Here we establish that by parity of reasoning,ST(+)can be related toLP(+)'s dual logicK3(+). We clarify the distinction between internal and external logic and argue that whileST(+)'s nonclassicality can be granted, its self-dual character does not tie it toLP(+)more closely than toK3(+).