A Proposition is a declarative sentence which iseither true or false (but not both true and false).'Itis raining','Today is Tuesday'and'3 is a factor of12'are examples of such sentences.We shal...A Proposition is a declarative sentence which iseither true or false (but not both true and false).'Itis raining','Today is Tuesday'and'3 is a factor of12'are examples of such sentences.We shall notconcern ourselves with sentences that can not beassigned a true or false value.Sentences of thisnature are usually questions or commands,forexample,'Where is he?'and'Stand up!'If we take some propositions and put展开更多
文摘A Proposition is a declarative sentence which iseither true or false (but not both true and false).'Itis raining','Today is Tuesday'and'3 is a factor of12'are examples of such sentences.We shall notconcern ourselves with sentences that can not beassigned a true or false value.Sentences of thisnature are usually questions or commands,forexample,'Where is he?'and'Stand up!'If we take some propositions and put
