So i should ask more questions. What is a Wiener-Hopf equation, and
what is its relation to displacement rank? What's so special about
symplectic conservation? Why did i hear about momentum and energy, but
not symplectum? [sic. Basically, the answer is in Kepler's law.]  Why
is the wave equation not seperable in more than one time and space
dimension? [Hmm. Because it is intrisicly \emph{spatial}. It is about
the \emph{coupling in space} of certain fenomena. In one dimension,
coupling is only left--right, so there's no arbitrary angle. Maybe the
right answer is: the equation is seperable, but in so many parts
(angles/rays) that it doesn't really compare to the $2$ part 1D
solution.] What's the deal with this time is imaginary business, and
wick rotation. [It's just a way to deal with hyperbolic spaces
differently?] Is this more than a notational trick, or does it really
say something? An, last but not least, what is a stochastic process?
[It is a distribution of functions, and not a function of a stochastic
variable.  Or, the stochastic variable is a function of time, a
trajectory.]