And also true.
And then tests them against observations and/or experiments. The ToE is very, very well tested.
Lol, it's still full of assumptions.
The basic principle, evolution, is taken for granted. F.M. Wuketits, an evolution theorist, writes:“We pre-suppose the essential correctness of biological evolution, yes, we assume that evolution is universally valid.”
Another assumption: One should not drag in a creator (or synonyms such as designer, planning spirit, or “demiurge”). Ernest Kahane, a French molecular biologist, formulates it as follows: “It is absurd and absolutely preposterous to believe that a living cell could come into existence by itself; but, notwithstanding, I do believe it, because I cannot imagine anything else.”
Mutation and selection are the driving forces of evolution” (K. Lorenz).
If there were only one single example (experiment or observation) of the origin of a new kind of organism or a new structure, then this would have been a derived theory. The mechanisms, mutation and selection, do occur, and the appearance of a new kind would imply new genetic information. Because of the lack of any evidence of new genetic information, it remains an assumption.