No physical processes have ever been demonstrated which provide a mechanism for the universe to assemble itself.

True

False

Look into the big bang theory not sure if it is considered to be demonstrated but it is a popular scientific theory

There are some very plausible hypotheses in modern Cosmology that use

well-known and long-proven Physics and Math to explain the evolution of the

universe, and account very nicely for the items and structures that we see all

around us in every direction.

The hypotheses have not been demonstrated, because it's really hard to

set up an experiment in the lab, and then wait several billion years for the

interstellar nebula to condense into a star and planets and life to form on

the planets.

So to answer the question, it's true that the processes have not been

demonstrated. But it's false that no plausible hypotheses exist that explain

the evolution of the modern universe, and that correspond nicely with what

we're able to observe of the structure of the universe today.