The epistemic demands of friendship: friendship as inherently knowledge-involving

Facebook and the epistemic logic of friendship

This paper presents a two-dimensional modal logic for reasoning about the changing patterns of knowledge and social relationships in networks organised on the basis of a symmetric ‘friendship’ relation, providing a precise language for exploring ‘logic in the community’ [11]. Agents are placed in the model, allowing us to express such indexical facts as ‘I am your friend’ and ‘You, my friends, ...

‘ Friendship ’ for fitness or ‘ friendship ’ for friendship ’ s sake ?

Correspondence: P. Stopka, Department of Zoology, South Parks Road, Oxford OX1 3PS, U.K. (email: [email protected]). L. Barrett is at the School of Biological Sciences, University of Liverpool, Liverpool L69 3BX, U.K. Hemelrijk et al. (1999), using data from a captive chimpanzee, Pan troglodytes, colony, state that there is no evidence to suggest that individuals trade ‘social services’...

Axiomatizing Epistemic Logic of Friendship via Tree Sequent Calculus

This paper positively solves an open problem if it is possible to provide a Hilbert system to Epistemic Logic of Friendship (EFL) by Seligman, Girard and Liu. To find a Hilbert system, we first introduce a sound, complete and cut-free tree (or nested) sequent calculus for EFL, which is an integrated combination of Seligman’s sequent calculus for basic hybrid logic and a tree sequent calculus fo...

The Association between Friendship Companionship and Friendship Temporality: the Moderating Roles of Friendship Context and Ethnicity

A Probe into the Concept of Friendship in the Qur’ān

The topic of human relationships—be they positive and sympathetic, or negative and hostile—receives a great amount of attention in the Qur’ān. Human beings need to be aware of both their friends and their enemies in order to learn how to engage with both groups, how to make additional friends and defend themselves from harm caused by enemies, and, if possible, turn these enemies into friends. T...