The morphological properties of genealogical and marriage alliance networks constitute a key to the understanding of matrimonial behavior and social norms, in particular where these norms have not been explicitly formalized. Their analysis, however, faces a major difficulty: the actual datasets which allow researchers to reconstruct kinship and alliance networks are generally subject to a marke...

Studies of reasoning often concern specialised domains such as conditional inferences or transitive inferences, but descriptions often cut across such domains, for example: If the circle is to the left of the square then the triangle is to the right of the square. The square is to the right of the circle. The triangle is to the right of the square. Could all three of these assertions be true at...