This list includes well known paradoxes grouped thematically The grouping is approximate as paradoxes may fit into more than one category This list collects only scenarios that have been called a paradox by at least one source and have their own article in this encyclopedia Although considered paradoxes some of these are simply based on fallacious reasoning falsidical or an unintuitive solution veridical Informally the term paradox is often used to describe a counterintuitive result