This paper develops and compares two tableaux-style proof systems for Peirce algebras. One is a tableau refutation proof system, the other is a proof system in the style of Rasiowa-Sikorski.

The existence of auxin as a mobile growth regulator was famously inferred by Charles and Frances Darwin, as described in their 1880 book, The Power of Movement in Plants (Darwin and Darwin, 1880). However, auxin was not isolated until much later by Went (1926). Its first ever mention in Plant Physiologywas in Went’s obituary, written by George Peirce, which credits Went with having “introduced ...

ENTURY OF L IFE H APPY B IRTHDAY P AUL W EISS Paul Weiss, one of the great American philosophers of the twentieth century, celebrated his 100th birthday on 19 May. Peirceans worldwide are indebted to Paul for the crucial role he played in the 1930s in editing Peirce’s writings for the Harvard edition. The Collected Papers inaugurated Peirce scholarship, standing as the historical foundation for...

The existence of auxin as a mobile growth regulator was famously inferred by Charles and Frances Darwin, as described in their 1880 book, The Power of Movement in Plants (Darwin and Darwin, 1880). However, auxin was not isolated until much later by Went (1926). Its first ever mention in Plant Physiologywas in Went’s obituary, written by George Peirce, which credits Went with having “introduced ...

A perennial concern among Peirce commentators has been the articulation of Peirce’s model of individual selfhood which underwrites his notion of self-control. A sticking point for most accounts is that Peirce seems to characterize the self along two different lines, at times describing it as a sign and produced by a community while at others characterizing it primarily in terms of embodiment an...

In this article I trace the historical development of Peirce’s semiotic rhetoric from its early appearance as a sub-discipline of symbolistic to its mature incarnation as one of the three main branches of the science of semiotic, and argue that this change in status is a symptom of Peirce’s broadening semiotic interest. The article shows how the evolution of Peirce’s theory of signs is linked t...