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Open Compositionality: Towards a New Methodology of Language argues that natural languages, like English and Spanish, are not only systems of representation useful for communication but also highly interactive cognitive capacities allowing humans to engage in complex forms of cognition. This view goes against the orthodox approach within philosophy of language, which considers natural languages to be specialized systems consisting of only linguistic elements and functioning in a closed compositional manner, allowing for fully formal, algebraic descriptions. Eduardo García-Ramírez rejects the longstanding principle of compositionality, according to which the meaning of any complex expression is fully determined by its parts and the way they are combined, and he substitutes it with an alternative, open, and interactive one. This novel view of the nature of language better accounts for the empirical evidence. García Ramírez develops an account of open compositionality, accompanied by the cognition-first methodology, in which natural languages are conceived as supermodular cognitive capacities that allow for interaction among multiple distinct areas of human cognition. The explanatory success of this original proposal and its accompanying methodology are tested by the author's account of three enduring philosophical problems: substitution failure, empty names, and the nature of moral discourse.

Are natural languages genuinely compositional? What roles does context play in linguistic communication, and by what means? In particular, does context interfere with the compositional determination of truth conditions? What meanings should theorists assign to sentences if compositionality is to be retained? These are the central questions of this important volume of new philosophical essays in honour of Ernie Lepore.

The second volume is devoted to issues of compositionality that arouse in the sciences of language, the investigation of the mind, and the modeling of representational brain functions. How could compositional languages evolve? How many sentences are needed to learn a compositional language? How does compositionality relate to the interpretation of texts, the generation of idioms and metaphors, and the understanding of aberrant expressions? What psychological mechanism underlies the combination of complex concepts? And finally, what neuronal structure can possibly realize a compositional system of mental representations?

Representational systems such as language, mind and perhaps even the brain exhibit a structure that is often assumed to be compositional. That is, the semantic value of a complex representation is determined by the semantic value of their parts and the way they are put together. Dating back to the late 19th century, the principle of compositionality has regained wide attention recently. Since the principle has been dealt with very differently across disciplines, the aim of the two volumes is to bring together the diverging approaches. They assemble a collection of original papers that cover the topic of compositionality from virtually all perspectives of interest in the contemporary debate. The well-chosen international list of authors includes psychologists, neuroscientists, computer scientists, linguists, and philosophers.