[citation needed] He is not trying to show that quantum mechanics itself can be understood in a common sense framework, quite the opposite.
[citation needed] He argues that modern science has, necessarily, become more and more formal, and more and more remote from common sense, as it strives to make itself an accurate reflection of the physical world.
Quantum decoherence, on the other hand (in combination with the consistent histories approach), recovers classical behaviour at the macroscopic level.
The formal mathematics of this approach allows us to demonstrate, finally, that is impossible (or rather, massively improbable) for a macroscopic Schrödinger's cat to exist for longer than a minuscule time (related to the macroscopic energy dissipation time by a factor involving the square of the Planck constant) in a quantum superposition of its |alive⟩ and |dead⟩.
Omnès makes clear that others contributed materially to the research described in his book, including Robert Griffiths, Murray Gell-Mann, and James Hartle.