Is cogito ergo sum logical?

All logical systems are based on a set of postulates - concepts that seem obvious, are accepted as true, and cannot be proved within that system. CES is a postulate within many philosophical systems. You could create a system whereby CES is provable, but you've simply exchanged it for some other set of postulates.

Is cogito ergo sum logical?

It seems obvious, but is it really?

~~~ "Cogito Ergo Sum!"

"I think, therefore I am!" - Descartes

This saying is exactly true, as it refers to the egoic construct of autonomous existence of a 'self', an 'I', as opposed to a 'you'/'other'.

'Ego' is the same, one and the same, as 'thought'!

Hence 'thought' being where this (egoic) 'self' exists. That is the 'I' to which the quote refers!

No 'thought/ego' = no egoic 'I'!

There can be no 'I' without 'thought'.

Thought, though, does not 'create' the egoic "I", they are one and the same, as perceived!

We don't 'think outside the box', 'thought' IS the box!

The above referenced 'I', or small 's' 'self' cannot exist in a thoughtless state, such as a Zen state where no such distinctions can be perceived.

There only exists 'one', (capital 'S') 'Self!', which is 'Universally all inclusive'. Which does not disappear when 'thought' is no longer perceived!

Ask any successful meditator, or check it out yourself.

Capisce'?

It is 'thought' that says, "I am not that!"

"Thou Art That!"

tat tvam asi (http://en.wikipedia.org/wiki/Tat_Tvam_Asi)

I think it is wrong, but I can't fault it's logic. Logic does not tell you what has been left out.

Within its defined frame it is. Though Gassendi tossed it about and thought it trite. You know what ''trite'' means here?

It is so obvious it is what is called in philosophy "the given". The given is what is obvious that cannot be refuted--without using the very obvious itself in the refutation.

In other words, if you say "It is not obvious that 'I think'"--then who is doing the thinking? It is a given that it is the speaker--you.

Yep.

Sure it is. You have to exist to be thinking about that - or anything.

Yes it is.