In his work "Philosophical Investigations" (1953), Ludwig Wittgenstein regularly referred to the concept of language-games. Wittgenstein rejected the idea that language is somehow separate and corresponding to reality, and he argued that concepts do not need clarity for meaning. Wittgenstein used the term "language-game" to designate forms of language simpler than the entirety of a language itself, "consisting of language and the actions into which it is woven" (PI 7) and connected by family resemblance ("Familienähnlichkeit"). The concept was intended "to bring into prominence the fact that the speaking of language is part of an activity, or a form of life," (PI 23) which gives language its meaning.