# What does "aggregative mechanical thought" mean in Frege's works?

In *The Foundations of Arithmetic: A Logico-Mathematical Enquiry Into the Concept of Number" by G. Frege pages XV and XVi we read:

A typical crudity confronts me, when I find calculation described as "aggregative mechanical thought". I doubt whether there exists any thought whatsoever answering to this description. An aggregative imagination, even, might sooner be let pass; but that has no relevance to calculation.

The present work will make it clear that even an inference like that from n to n + i. which on the face of it is peculiar to mathematics, is based on the general laws of logic, and that there is no need of special laws for aggregative thought.

What is the exact meaning of "aggregative"? I searched Google Books and the internet but there is not any obvious explanation of it.

Frege says in the footnote that Kuno Fischer in his System der Logik und Metaphysik: oder Wissenschaftslehre section 94 describe calculation as "aggregative mechanical thought" but I dont know German and cannot read the source. Would you please help me grasp it?

• Dedekind in "The nature and meaning of numbers"(in Essays on the theory of numbers) mentioned that: If we scrutinise closely what is done in counting an aggregate or number of things, we are led to consider the ability of the mind to relate things to things, to let a thing correspond to a thing, or to represent a thing by a thing, an ability without which no thinking is possible. Apr 2, 2013 at 9:55
• Is there any relevance to the Context Principle and the way Frege developed the Classical logic against traditional i.e. first considering the meaning of whole and then find, extract the use and meaning and so on of every parts from the whole against the method of thinking and discussing about e.g. subjects and predicates separately and then put them together to form a proposition or an thought? I also ask this question on AskPhilosophers [link] and hope to see some comments from Prof. Heck (askphilosophers.org/question/5107) Apr 9, 2013 at 4:18