At the core of his "theory of everything" is that 1 X 1 = 2. Sabine Hossenfelder, a theoretical physicist and science ...

the holy grail of physics has been finding a theory of everything—uniting quantum mechanics with Einstein's theory of general relativity, which applies to the universe on large scales.

A fundamental theory of everything. Even with the subjunctive, this is certainly a powerful statement that should be met with some skepticism. What is considered a fundamental theory of physics?

String theory is perhaps the most high-profile candidate for what physicists call a theory of everything – a single mathematical framework capable of describing the entirety of the known universe.