My own belief is that the universe never actually started in the BB... as the song goes there's no beginning and there's no ending...

So what is that: "The knowledge you are seeking lies beyond sensory data, trustworthy or not."?

Beyond sensory data, are you alluding to 'faith' here?

well you know my hallucinations might tell me something about reality... who knows. :-)
https://www.youtube.com/watch?v=zE7PKRjrid4

BTW, I took both the red and blue pills... :-D

Well, why not to dare to question my senses if I may hallucinate something etc then my senses can be fooled.
If my senses can be fooled then how can I trust my senses?

To tell you the truth I was diagnosed with schizophrenia some 22 years ago, I lost touch with reality; so it makes me wonder what is indeed real and what is not.
I spend too much time in the computers anyways...

Perhaps I should take a break and watch Venom... that Homological Algebra can be quite tiresome...
:-D

Don't know. There are all sorts of logics out there.

The problem with higher than first order logic, is that they don't have a complete proof theory.
https://en.wikipedia.org/wiki/Second-order_logic
(under MetaLogical results).

In the logic you are using can we use modus ponens as an inference rule?

As Einstein once said "everything is relative". I believe in everything and in nothing. There was once a poster called grady from physicsforums who in his signature wrote:"why should I believe if I can just disbelieve".
I don't know to what to believe anymore, so many faiths, and that's my truth. :-(
https://www.youtube.com/watch?v=YHHvEksC7oc&ab_channel=NuclearBlastRecords

But Einstein also said "God doesn't play dice", i.e he disbelieved Quantum Physics is the correct picture of reality. Are there any mainstream physicists nowadays who disbelieve Quantum Physics, I don't think there is such, but no one understands it (as the saying goes). Who was it quoted that he likes the "shut up, and calculate" interpretation?
https://en.wikiquote.org/wiki/Shut_up_and_calculate
https://www.youtube.com/watch?v=IgY-dpDKiJI&t=734s&ab_channel=JediMasterGeoff

Sometimes, I do believe that I am God though.
As Aristotle said:
https://www.brainyquote.com/quotes/aristotle_399587

Yeah Long live the Misanthrope!
https://www.youtube.com/watch?v=YFug3xQBKAk&ab_channel=NuclearBlastRecords

That's it, I don't know what is a "sane person".

Define to me "sane person".

I know. You gotta love Logic!

A classical song:
https://www.youtube.com/watch?v=dSbKNkPlrxk&ab_channel=fallenleaf25

The existence of God.

something can be real to me but not real to someone else.

That's what I am getting at.

Reality is what you believe to be real, in short.

Let's see if I can't depend on my senses to gather what is real then I left with my mind.
https://www.youtube.com/watch?v=WM8bTdBs-cw&ab_channel=Metallica

And I might hallucinate, but the hallucination is my reality.

You,I,me,him,her, everybody needs some recognition cause being all alone is quite a freitening thought to bear. But eventually all our are dear loved ones will perish and die... :-(

And when I think about it, now I just might be talking to myself... :-D

When you think about it really. In philosophy there are only questions and no answers. As opposed to maths,physics,engineering and logic where there should be a definite answer to every question even if the problem is unanswerable, then answer is that it's unanswerable.
So I think I contradicted my self here, and philosophy does have answers that we cannot answer those question really, that is the answer.

Quite hilarious, ain't it?!

Don't be so humble, you are a genius!

:-D

You didn't but I did.
so yes you did.

If you want to write it in Doxastic Logic's notation then it's: from Bp being true you can entail that p is true.

The Socrates theme was a reply to Banno's DisneyLand YT film.

Anyways, the Liar paradox can also be regarded as both true and false.
As long as you or I or him believe something to be true, then it's true.

It doesn't matter if it's true for others, as long as you or I or him believe it to be true.
Besides of course tautologies and contradictions, and statements like "I am a Liar" which are by definition always true or always false.

As for Socrates I am not even sure he ever existed, perhaps he is/was a fictional character...'
What's the difference between fiction and reality in that case? it depends on what do you believe of course...

Something is true, if you believe it to be true.

Obviously Av~A is true and A&~A is false. Other statments are contingents, as in are not a tautology nor contradictions.
That's all there's to it really... :-)

Well, you need ro assume something, don't you?

Unless you want to assume the empty assumption of not assuming anything... :-)
In which case you cannot argue anything.

In what type of Logic do you want your proof to be served to you?

Like our conversation.

Reality is habitual hallucination, whatever that means... :-)

Does Jack think the bartender is real or not?
You are contradicting yourself.

So he's not real, because he doesn't believe the bartender is real.

How do you know?

Then he's real.

Real is what you believe to be real.

Another book which should be on every logician shelfs is Logic of provability by George Boolos. I started reading it years ago, I believe this should be covered there not sure 100 percent because I never finished reading this book. I read it back in my undergraute years as a student of maths and physics combined.

I am not sure this is addressed in those books. But are you acquainted with peter smith's book and Smullyan's books?

First cause is not a logical necessity.
Existence is either way paradoxical.
You can find a system where it's necessary and a system where it's not necessary.

We don't know what is the truth, maybe after death we'll know, or we might not know either, this life may all be a dream within a dream ad infinitum, waking up from one dream to the next...