Things that Must Not Be Done in Gynecological and Obstetrics

Not everything that can be done should be done.

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What Must, Ought, Is Worth and May Not Be Done

The Praxis model of reasons for action takes choice among alternative courses of action to be a matter of what must, ought, is worth and may not be done. It envisages practical decision making systems being given their reasons for action as requirements, duties, rules of valuation, proscriptions and contingent circumstances in a knowledge base. The model’s principles of selection and automated ...

Things that can and things that can ’ t be done in PRA Ulrich

Things That Can and Things That Cannot Be Done in PRA

Things that can and things that can’t be done in PRA

It is well-known by now that large parts of (non-constructive) mathematical reasoning can be carried out in systems T which are conservative over primitive recursive arithmetic PRA (and even much weaker systems). On the other hand there are principles S of elementary analysis (like the Bolzano-Weierstraß principle, the existence of a limit superior for bounded sequences etc.) which are known to...