Will an 'ultimate' theory of everything be found?

In an ultimate theory, everything must emerge from the interaction of simple parts.

It was the ultimate theory, and he had proven it beyond a doubt.

At the moment there are two pretenders to the throne of that ultimate theory.

So far, I have implicitly assumed that there is an ultimate theory.

Is the ultimate unified theory so compelling that it brings about its own existence?

The problem is that the ultimate theory envisioned by Hawking and others never materialized.

What would it mean if we actually did discover the ultimate theory of the universe?

"We can still put ultimate limits on things without even knowing the ultimate theory," he said.

If human life were long enough to find the ultimate theory, everything would have been solved by previous generations.