@deepthot,
Descartes should have said: "I experience life, which I couldn't do if I were not reallly real. Therefore, I am really real!
Since he didn't say it, I will say it.
You see, it is better to be real than merely to exist.
I said it - and I'm glad!
Now does anyone have any quarrel - or better yet, any improvements to suggest - with the axiometric analysis of the original post? If no serious objections, why not adopt it from here on, and use language that way.
By "to consist" I mean that an idea is put forth and it is a constituent of a cluster of thoughts in a mind - and I will grant that thoughts are silent verbalizations; or vice versa - talkking is voluble thinking - so being constituents, the ideas consist. When someone makes an assertion or a claim it is as if s/he were stipulating an assumption for an argument, or a step in a proof, or positing a new symbol, or expressing some metaphor. Ideas are the constituents... so to say they only consist in a mind is not a stretch.
A "concept" though I defined in my College Course book, as having a designator, a meaning, and an application: a label, an intension, and an extension. The members of the extension - the class of application - usually exist - unless the concept is of a fiction, a number, or some other mathematical or logical entity.
All this is quite reasonable and ought to find wide acceptance.
---------- Post added at 07:57 PM ---------- Previous post was at 07:50 PM ----------
Augustine Intrinsically valued numbers, and would claim that they have a reality which we might discover. They are like platonic Ideals - out there somewhere for us to stumble across. Many an inventor and creator, or mathematical genius, feels he discovered a Truth that was there in perhaps The Akasia Recordss waiting to be found.