Abstract We treat the problem of reasoning with ambiguous propositions. Even though ambiguity is obviously problematic for reasoning, it no less obvious that propositions entail other (both and unambiguous), are entailed by This article gives a formal analysis underlying mechanisms, both from an algebraic logical point view. The main result can be summarized as follows: sound (and complete) req...

Traditionally, a grammar defining the syntax of programming language is typically both context free and unambiguous. However, recent work suggests that an attractive alternative to use ambiguous grammars,thus postponing task resolving ambiguity end user. If all programs accepted by can be rewritten unambiguously, then parser for said resolvably ambiguous. Guaranteeing resolvable statically---fo...

We report on an experiment in which subjects choose actions in strategic games with either strategic complements or substitutes against a granny, a game theorist or other subjects. The games are selected in order to test predictions on the comparative statics of equilibrium with respect to changes in strategic ambiguity. We find that subjects face higher ambiguity while playing against the gran...

We develop a theory for waveform-diverse moving-target synthetic-aperture radar in the case in which a single moving antenna is used both on transmission and on reception. We assume that the targets (scattering objects) are moving linearly, but we allow an arbitrary, known flight path for the antenna and allow it to transmit a sequence of arbitrary, known waveforms. A formula for phasespace (po...

An “investment bubble” is a period of “excessive, and predictably unprofitable, investment”(DeMarzo, Kaniel and Kremer, 2007, p.737). Such bubbles most often accompany the arrival of some new technology, such as the tech stock boom and bust of the late 1990’s and early 2000’s. We provide a rational explanation for investment bubbles based on the dynamics of learning in highly uncertain environm...

We test the implications of ambiguity aversion in a principal-agent problem with multiple agents. When output distributions are uncertain, models of ambiguity aversion suggest that tournaments may become more attractive than independent wage contracts, in contrast to the case where output distributions are known. We do so by presenting agents with a choice between tournaments and independent co...