{{Unreferenced, date=November 2008
Quasi-syllogism is a
categorical syllogism
A syllogism ( grc-gre, συλλογισμός, ''syllogismos'', 'conclusion, inference') is a kind of logical argument that applies deductive reasoning to arrive at a conclusion based on two propositions that are asserted or assumed to be true.
...
where one of the premises is ''singular'', and thus not a categorical statement.
''For example:''
#All men are mortal
#Socrates is a man
#Socrates is mortal
In the above argument, while premise 1 is a categorical, premise 2 is a singular statement referring to one individual. While this is a valid
logical form
In logic, logical form of a statement is a precisely-specified semantic version of that statement in a formal system. Informally, the logical form attempts to formalize a possibly ambiguous statement into a statement with a precise, unambiguo ...
, it is not strictly a categorical syllogism.
Of course, it has been suggested that you can ''translate'' any singular statement into a categorical.
''For example:''
#Socrates is a man
#All members of a class of which the only member is Socrates are men
The above two premises may be considered identical, but the first is a singular and the second is a categorical.
See also
*
Syllogism
A syllogism ( grc-gre, συλλογισμός, ''syllogismos'', 'conclusion, inference') is a kind of logical argument that applies deductive reasoning to arrive at a conclusion based on two propositions that are asserted or assumed to be true.
...