ECON 2P30 Lecture : Chapter2.pdf
17 Jan 2013
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Department of economics, brock univer- sity, 500 glenridge ave. , st. catharines, ontario, l2s 3a1, canada. This document was typeset with the latexdocumentation system using the xy-pic and the mnsymbol packages. Given our discussion of propositions and the use of connectives and quan- ti ers to make valid propositional forms in the previous chapter, the next important tool to learn is in establishing the truthfulness of a given proposi- tion. For example, one could claim that if a consumer has locally nonsatiated preferences then walras" law holds. This is clearly, from our previous dis- cussion of propositional logic, a conditional sentence given by p r where. P = a consumer has locally nonsatiated preferences and r= walras" law holds . We should also know, by now, that the conditional statement is false only when the antecedent is true and the consequent is false.
