Petr Kuchynka

Pavel Materna proposed valuable explications of concept and conceptual system. After their introduction, we contrast conceptual systems with (a novel notion of) derivation systems. Derivation systems differ from conceptual systems especially in including derivation rules. This enables us to show close connections among the realms of objects, their concepts, and reasoning with concepts.

Language is an instrument of formulating and communicating ideas. Since not every idea can be (precisely) formulated in language and not all linguistic formulations represent some idea, the user of language is in danger of using linguistic nonsense. An explication of the concept of linguistic nonsense is given by the means of transparent intensional logic of Pavel Tichý.