We point out that a simple test of the mechanism of CP violation can be performed by a measurement of the CP asymmetries in exclusive and inclusive radiative rare decays. We show that the rate asymmetries ∆Γ = Γ(B → fγ)− Γ(B+ → f̄γ) for certain final states f can be predicted in a theoretically clean way. Some implications for b → sl+l− decays are discussed.

The ruling by the Constitutional Court in Minister of Finance v Afribusiness NPC sounded death knell for 2017 Preferential Procurement Policy Framework Act (PPPFA) regulations. By a narrow majority, dismissed an appeal against SCA which declared regulations invalid. This article offers critique both majority and minority judgments. It calls into question fundamental premise on majority’s reason...

Propositional Typicality Logic (PTL) is a recently proposed logic, obtained by enriching classical propositional logic with a typicality operator. In spite of the non-monotonic features introduced by the semantics adopted for the typicality operator, the obvious Tarskian definition of entailment for PTL remains monotonic and is therefore not appropriate. We investigate different (semantic) vers...

A preferential entailment is defined by a binary relation, or “preference relation”. This relation can be either among interpretations or among sets of interpretations. The relation can be also among “states” which are “copies of interpretations”, or “copies of sets of interpretations”. This provides four kinds of preferential entailments. The paper deals mainly with propositional logic, howeve...

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Today, claims for social justice seem to divide into two types: claims for the redistribution of resources and claims for the recognition of cultural difference. Increasingly, these two kind of claims are polarized against one another. As a result, we are asked to choose between class politics and identity politics, social democracy and multiculturalism, redistribution and recognition. These, h...