Personally, I find the concept of a "final theory," or a "theory of everything," rather limiting. The fun of discovery will most likely last as long … - F. J. Duarte

The EPR claim of an "all values" spread in the coordinate depends on an idealized absolute and exact measurement of <math>p</math> with <math>\Delta p\ = 0</math>. Since this is physically impossible, the claim of "no physical reality" can be negated.

Feynman uses Dirac's notation to describe the quantum mechanics of stimulated emission... he applies that physics to... dye molecules... In this regard, Feynman could have predicted the existence of the tunable laser.

The longer the cavity and the narrower the beam waist, the better the beam quality of the laser emission, or
<math> |\langle x | s \rangle|^2\ = \sum_{j=1}^\N\,\Psi(r_j)^2\ +2 \sum_{j=1}^\N\,\Psi(r_j)\bigg(\sum_{m=j+1}^\N\,\Psi(r_m)cos(\Omega_m-\Omega_j)\bigg) </math>