![]() ![]() The XOR operation does not have a standard symbol, but is sometimes denoted A xor B (this work) or A direct sum B (Simpson 1987, pp. ![]() It yields true if exactly one (but not both) of two conditions is true. It is the hypothetical source of/evidence for its existence is provided by: Greek legein "to say, tell, speak, declare to count," originally, in Homer, "to pick out, select, collect, enumerate " lexis "speech, diction " logos "word, speech, thought, account " Latin legere "to gather, choose, pluck read," lignum "wood, firewood," literally "that which is gathered," legare "to depute, commission, charge," lex "law" (perhaps "collection of rules") Albanian mb-ledh "to collect, harvest " Gothic lisan "to collect, harvest," Lithuanian lesti "to pick, eat picking " Hittite less-zi "to pick, gather. A connective in logic known as the 'exclusive or,' or exclusive disjunction. It forms all or part of: alexia analects analogous analogue analogy anthology apologetic apologue apology catalogue coil colleague collect college collegial Decalogue delegate dialect dialogue diligence doxology dyslexia eclectic eclogue elect election epilogue hapax legomenon homologous horology ideologue idiolect intelligence lectern lectio difficilior lection lector lecture leech (n.2) "physician " legacy legal legate legend legible legion legislator legitimate lesson lexicon ligneous ligni- logarithm logic logistic logo- logogriph logopoeia Logos -logue -logy loyal monologue neglect neologism philology privilege prolegomenon prologue relegate sacrilege select syllogism tautology trilogy. Having seen the formal definition of a function, it wont hurt you much. We then give an informal introduction to the key elements of Logic - logical sentences, logical entailment, and logical proofs. dertons Mathematical Logic, and, for historical perspective, supplementary. We start with a discussion of possible worlds and illustrate the notion in an application area known as Sorority World. Proto-Indo-European root meaning "to collect, gather," with derivatives meaning "to speak" on the notion of "to gather words, to pick out words." This chapter is an overview of Logic as presented in this book. Logic is the science and art which so directs the mind in the process of reasoning and subsidiary processes as to enable it to attain clearness, consistency. For the purposes of this entry, let us define logic as that field of inquiry which investigates how we reason correctly (and, by extension, how we reason. ![]()
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