The conclusions from the foregoing are these: First, the usual mode of converting an A is to interchange subject and predicate, limiting the latter by the word “_some_” or a word of similar significance. Second, this mode is called _conversion by limitation_. Third, the converse of an _A_ is an _I._ _The Co-extensive A._ In the conversion of A propositions there is the one exception of “co-extensive A’s,” such as truisms and definitions. It will be remembered that with these both subject and predicate are distributed; hence, they may be interchanged without limiting the predicate by “some.” To illustrate: The converse of the truism, “A man is a _man_.” is “A _man_ is a man,” while the converse of the definition, “A man is a rational animal,” is “A rational animal is a man.” This mode of interchanging subject and predicate without limiting the latter is called _Simple Conversion_. The ordinary A proposition is thus _converted_ by _limitation_, while the co-extensive A is _converted simply_. _Converting an E proposition._ As both terms of the E proposition are distributed it is not possible to violate the rule of distribution. It is to be remembered that no fallacy is committed by “undistributing” a term which is already distributed. _Illustrations._ _Convertend._ _Converse._ No men are immortal. No immortals are men. Simply. No birds are quadrupeds. No quadrupeds are birds. Simply. No metals are compounds. No compounds are metals. Simply. No men are immortal. Some immortals (at least) are not men. Limitation. No birds are quadrupeds. Some quadrupeds are not birds. Limitation. No metals are compounds. Some compounds are not metals. Limitation. Three facts are evident relative to the converting of an E. First: An E proposition may be converted either _simply_ or by _limitation_. Second: E may be converted into either _E_ or _O_. Third: If the converse is an O then is the inference a _weakened_ one, being _particular_ when it could just as well be _universal_. _Converting an I proposition._ With an I proposition neither term is distributed. Thus care must be used lest an undistributed term in the convertend be distributed in the converse. _Illustrations_: _Convertend._ _Converse._ Some men are wise. Some wise beings are men. Some teachers scold. Some who scold are teachers. Some high school graduates Some who enter college are high enter college. school graduates. Some Americans live simply. Some who live simply are Americans. From the foregoing we conclude first, that I is _converted simply_; second, that I is converted _into I_. _The O Proposition._