He seemed to be asserting that synonymity cannot possibly be defined in a non-circular way. We attempt to show this is false on the basis of defining the Quine/Carnap example in a non-circular way.
https://en.wikipedia.org/wiki/Two_Dogmas_of_Empiricism#Analyticity_and_circularity
Quine's main objection seemed to be that it is impossible to define synonymity in a non-circular way. He mentions some form of the word: "synonym" 93 times. I show how to define his example in a non-circular way thus at least overcoming this aspect of his objection.
When we specify the relevant conceptual classes
M1 is the class of all adult male humans
M2 is the class of all married adult male humans
B is the class of all unmarried adult male humans
U is the class of all unmarried adult male humans
B = M1 - M2
U = M1 - M2
B and U are verified to be synonymous on the basis that they specify the exact same conceptual class.
TWO DOGMAS OF EMPIRICISM by W. V. Quine The Philosophical Review, Vol. 60, No. 1 (Jan., 1951), pp. 20-43 https://pdfs.semanticscholar.org/675b/0ac190985cb2a91f9c8b505af25bd5b10833.pdf?_ga=2.94076253.153026009.1586290224-1393250255.1585101085
Does this reformulation of the the analytic / synthetic distinction overcome Quine's objections?
The way that I divide analytic from synthetic may be unconventional. Every aspect of knowledge that can be represented in language and encoded as strings of characters is {analytic knowledge}. Every aspect of knowledge that can only be perceived as sensations through the sense organs is {empirical knowledge}. I discard the use of the term synthetic.
This distinction between analytic and empirical seems unequivocal.
By defining the distinction this way we avoid all of the prior difficulties of specifying the meaning the word: "meaning". As long as sense data from the sense organs is not used as a basis for evaluating the truth of the expression the expression is not synthetic.
This would seem to address Quine's objections by possibly reformulating the analytic/synthetic distinction so that the original objections would no longer apply to this new reformulation. This reformulation would seem to have no undecidable boundary conditions.
By reformulating the analytic / synthetic distinction to make it unequivocal we now derive a definite basis for foundationalism when it is restricted to the analytic side of this newly reformulated analytic / synthetic distinction.
Now we attempt to show that there is at least one example of analytic knowledge that definitely meets the original analytic/synthetic distinction:
An “analytic” sentence, such as “Ophthalmologists are doctors,” has historically been characterized as one whose truth depends upon the meanings of its constituent terms (and how they’re combined) alone. https://plato.stanford.edu/entries/analytic-synthetic/
The semantic meaning of this expression proves that it is true:
Successor(Successor(0)) > Successor(0)
That its truth only depends on its semantic meaning proves that there are expressions of language that are proved to be true entirely on the basis of their semantic meaning. The above example seems to prove that there are at least some expressions of language that meet the original analytic / synthetic distinction.
Analytical_Knowledge
Is knowledge of the relations between abstract objects. The semantic meaning of an analytic expression is entirely specified by the relations that it represents. Abstract objects and their relations are always expressed as relations between expressions of language.
Because analytic knowledge is relations between abstract objects expressed using language every analytic expression can be verified as true only on the basis that it has all of the required relations.
The above Peano axiom example shows the relation between the abstract objects of {two} and {one}. There are many different ways that this relation can be encoded in language. Each one of these ways has the same semantic meaning. 二大于一
An expression of language is analytic as long as it can be verified as true entirely based on its linguistic compositional meaning., [and does not require sense data from the sense organs].
Now we focus on one single aspect of Quine's's original objection:
He seemed to be asserting that synonymity cannot possibly be defined in a non-circular way. We attempt to show this is false on the basis of defining the Quine/Carnap example in a non-circular way.
https://en.wikipedia.org/wiki/Two_Dogmas_of_Empiricism#Analyticity_and_circularity
Quine's main objection seemed to be that it is impossible to define synonymity in a non-circular way. He mentions some form of the word: "synonym" 93 times. I show how to define his example in a non-circular way thus at least overcoming this aspect of his objection.
marital_status(bill, married).
marital_status(sam, single).
bachelor(X) :- \+ marital_status(X, married).
?- bachelor(bill).
false
?- bachelor(sam).
true
The above simple Prolog shows how to define bachelor(X) as synonymous with not married(X) without any cycles that the Wikipedia article about Quine's objection indicated would be required.
Quine, W. V. (1951) TWO DOGMAS OF EMPIRICISM
The Philosophical Review, Vol. 60, No. 1 (Jan., 1951), pp. 20-43
https://pdfs.semanticscholar.org/675b/0ac190985cb2a91f9c8b505af25bd5b10833.pdf?_ga=2.94076253.153026009.1586290224-1393250255.1585101085
The above paper goes on and on in very tedious great depth of its author's difficulty of defining synonymity between two terms. This is actually trivial. We simply define the meaning of one term and then define the meaning of the synonymous term on the basis of the definition of the first term as the Prolog has shown above.
Here is another way of saying the same thing
To define the synonymity of Bachelor(x) and ~Married(x) we fully elaborate all of the details of Married(x) using Rudolf Carnap (1952) Meaning Postulates then define the otherwise meaningless finite string: "Bachelor(x)" using the negation of the previously defined term Married(x).
To make this match the ordinary understanding of "Bachelor" we can augment its definition:
Bachelor(x) ≡ (~Married(x) ∧ Male(x) ∧ Human(x) ∧ Adult(x))
Bachelor derives all of its semantic meaning from terms that have been previously defined thus converting what Quine perceived as circularity into an inheritance hierarchy.