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Thought / general / special / particulate / singular / Frege: one and the same thought can be understood as general, particulate or singular by various decompositions - by the thought itself is not yet to determined what is the subject.
Subject / predicate / concept / term scope / Frege: E.g. "All A are B". - False: that A would be "subject" and B "predicate" . - Right: predicate is "part of the class" "some" / FregeVsSchröder: "some" is not a subject. - IV 98/99 "some" does not always refer to the same part of a class. - This leads to contradictions when regarded as a subject.
Die Grundlagen der Arithmetik Stuttgart 1987
Funktion, Begriff, Bedeutung Göttingen 1994
Logische Untersuchungen Göttingen 1993