Abst rac t . V~% here expand on a previous paper concerning the role of logic in information retrieval (IR) modelling.. In that paper, among other things, we had pointed out how differenV ways of understanding the contribution of logic to IR have sprung from the (always unstated) adherence to either the total or the partial'knowledge assumption. Here we make our analysis more precise by relat.i...

We here expand on a previous paper concerning the role of logic in information retrieval (IR) modelling. In that paper, among other things, we had pointed out how different ways of understanding the contribution of logic to IR have sprung from the (always unstated) adherence to either the total or the partial knowledge assumption. Here we make our analysis more precise by relating this dichotom...

The difference between perception and cognition seems introspectively obvious in many cases. Perceiving thinking have also been assigned quite different roles, epistemology, theories of reference mental content, philosophy psychology, elsewhere. Yet what is the nature distinction? In way, or ways, do differ? paper reviews recent work on these questions. Four main respects which held to differ a...