Books on Amazon
That "and" has become the word for the conjunction by contingent circumstances has no consequences on the status of the true statement that p is implied by p and q. What a set of sentences means depends on conventions. What follows from a set of premises does not depend on them (formal).
Logic/Nagel: logical judgments are based on our comprehension, but they are not a judgment about our ability of comprehension -
Das letzte Wort Stuttgart 1999
Was bedeutet das alles? Stuttgart 1990
Die Grenzen der Objektivität Stuttgart 1991