V 100
Mention/Use/Language Learning/Quine: the confusion mention/use is necessary for learning: the sound of the word has approximately the same effect as the sight of the object - also transition from observation statements to timeless statements: E.g. from "Fido is a dog" to "A dog is an animal" (the confusion is ignored here).
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Language Acquisition/Quine, >
Learning/Quine.
VII (e) 82ff
Mention/use/expression/Quine: e.g. the term "(F I Y)" itself is not a formula, but a name that describes the formula. ((s) conditional probability).
IX 22
Use/mention/Quine: on the right hand side of "ε" we use quantifiable variables - on the left hand side of "ε" we mention classes.
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Variables/Quine, >
Classes/Quine.
I 339
Mentioning/Use/Russell/Whitehead/QuineVsRussell/QuineVsWhitehead: Whitehead and Russell, who took the distinction between use and mention lightly, wrote "p implies q" (in the material sense) as if it were interchangeable with "If p, then q" (in the material sense).
C. I. Lewis did the same, he wrote "p implies strictly q" and declared it as "It is necessary that not (p and not q)". Hence, he developed a modal logic in which "necessary" is a sentence operator.
Solution/Quine: It is best to consider "implies" and "analytical" as general terms that are predicted by sentences by adding them predictively to names (i.e. quotations) of sentences. Unlike "and", "not", "if so" which are not terms but operators.
I 68
Implication/mention/use/Quine: not sentences or schemata are implied, but their names.
For we cannot write "implies" between the sentences themselves, but only between their names. So we mention the sentences by using their names. We are talking about the sentences. ((s) Implication is via the sentences.
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Implication/Quine.
Different:
Conditional/Quine: (">" or "if...then...") here we use the sentences or schemes themselves, we do not mention them. No reference is made to them. They appear only as parts of a longer sentence or schema.
Example: If Cassius is not hungry, then he is not skinny and hungry
This mentions Cassius but not a sentence. It is the same with conjunction, negation and alternation.
VII (e) 82
Mention/Use/Expression/Quine: For example: the expression "(φ I ψ)" is not a formula itself, but a name describing the formula.
VII (f) 112f
Sentence/Schema/Quine: the distinction between sentence and schema is not the same as that between mention/use.
IX 22
Usage/Mention/Quine: to the right of "ε" we use quantifiable variables, to the left of "ε" we mention classes.
X 62
Object language/meta language/mention/use/(s): the object language is mentioned (it is spoken about), the meta language is used to talk about the object language.
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Metalanguage/Quine, >
Object language/Quine.
