Quote from stu:
Right, so the thought (mental experience) is real. The thing which exists in this case is a thought . You use logic or material evidence to substantiate the truth of that.
No need to. Substantiation would be redundant. You already know that your mental experience is real because you experience it.
However, the thing in the thought, doesn't necessarily exist.
Right
So how you going to check if it does? With another thought as insubstantial as the one that thought of it, but couldn't access the truth of its existence?. Or with logic or material evidence,
You're going to check out the correspondence of the thought of the thing with the existence outside yourself of the thing through logic and material evidence but there's no need to prove to yourself the existence of your thought.
..which showed you it can substantiate the truth that a thought exists .
No. I'm saying that you can't substantiate the truth "that a thought exists" except in the most general terms and if the thought is your own there's no need to substantiate it. An EEG device might indicate that thinking is taking place but it can't investigate the specifics of that thinking. Only you can know the true nature of your thinking.
You determine the truth of this...how? With another thought of the same quality that established the concept of a nine-million ton chicken ? That would hardly be reliable
If you're determining the truth that the thoughts of another exist you have a problem; you determine the existence of your own thoughts by experiencing them.
But the chicken doesn't exist you say.. Much in the same way a thought about " the door to a universe of truth other than that which can be supported by logic or material evidence. " doesn't exist?
The chicken and the door lack existence to different degrees. While the concept of the chicken exists, the chicken itself is completely non-existent in all senses; the door is non-existent in a physical sense but has existence outside the self as a linguistic device - namely a metaphor - and as such is a transportable entity ( more than one person can use the same metaphor ).
Thoughts exist, things in thoughts , not necessarily. You need to add something to help see if those things in thoughts are true.
Would you not be better off using some logic or material evidence at this (and every other) point?
At every point except the the point of experience of your own thought. But the correspondence of the thought with the thing thought of sometimes can be verified using logic and material evidence and sometimes cannot.
Hans
(formerly Heidegger)