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Number / W.Salmon: confusion between number and numeral: in reality there is no binary numbers (These are characters) - just as "Roman" or "Arabic numbers" are always signs! The decimal system or the binary system are also just systems of characters, which refer to the same numbers!
Me I Albert Menne Folgerichtig Denken Darmstadt 1988
HH II Hoyningen-Huene Formale Logik, Stuttgart 1998
Re III Stephen Read Philosophie der Logik Hamburg 1997
Sal IV Wesley C. Salmon Logik Stuttgart 1983
Sai V R.M.Sainsbury Paradoxien Stuttgart 2001