Ideas from 'The Thought: a Logical Enquiry' by Gottlob Frege [1918], by Theme Structure

[found in 'The Frege Reader' by Frege,Gottlob (ed/tr Beaney,Michael) [Blackwell 1997,978-0-631-19445-3]].

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2. Reason / A. Nature of Reason / 5. Objectivity
There exists a realm, beyond objects and ideas, of non-spatio-temporal thoughts
3. Truth / A. Truth Problems / 2. Defining Truth
The word 'true' seems to be unique and indefinable
3. Truth / C. Correspondence Truth / 3. Correspondence Truth critique
There cannot be complete correspondence, because ideas and reality are quite different
3. Truth / H. Deflationary Truth / 1. Redundant Truth
The property of truth in 'It is true that I smell violets' adds nothing to 'I smell violets'
7. Existence / A. Nature of Existence / 2. Types of Existence
Thoughts in the 'third realm' cannot be sensed, and do not need an owner to exist
7. Existence / D. Theories of Reality / 7. Facts / c. Facts and truths
A fact is a thought that is true
9. Objects / A. Existence of Objects / 3. Objects in Thought
Late Frege saw his non-actual objective objects as exclusively thoughts and senses
18. Thought / A. Modes of Thought / 1. Thought
Thoughts have their own realm of reality - 'sense' (as opposed to the realm of 'reference')
We grasp thoughts (thinking), decide they are true (judgement), and manifest the judgement (assertion)
A thought is distinguished from other things by a capacity to be true or false
18. Thought / A. Modes of Thought / 9. Indexical Thought
Thoughts about myself are understood one way to me, and another when communicated
19. Language / E. Propositions / 2. Nature of Propositions
A 'thought' something for which the question of truth can arise; thoughts are senses of sentences
A sentence is only a thought if it is complete, and has a time-specification