The exact number of variable events (transits and variable stars) injected into the simulated images is unknown, but there should be several hundred of each type.
Not exact matches
This was propagated by a popular book some years back, but it's since been rebutted by many scientists who have stated that whilst practice and time spent certainly matter, the
exact number of hours to become an expert on something will vary from person to person depending on multiple
variables that differ from one person to the next.
Because
of the enormous
number of physical
variables on which it depends, and even more the growing predominance
of the psychic (individual choice) over the purely statistical, it seems to be decidedly the case that human evolution goes beyond the bounds
of exact calculation.
On the other hand, the system
of equations, which can be adapted to all
variables of interest to athletes (and not just speed), could enable occasional runners to find out the
exact number of calories lost during a race (and not a simple average as with today's available tools) in order to improve weight loss.
It is difficult to prescribe an
exact number of sets since there are many
variables to consider.
Jaye, lifespan is one
of those things so
variable that I did not even mention
exact numbers in my «Five Dog Breeds with Long Lives» hub.
If our best scientists, with the accumulated knowledge
of millennia, can not agree on the seriousness
of our current situation or what climate
variables will come into play over the next century, then how the heck are they supposed to determine the
exact size,
number, and placement
of massive sun shields to deflect the perfect the amount
of radiation, without any unforeseen consequences?
Some trees in the tropics can sink carbon at a rate
of 40 trees per ton but it is impossible to place an
exact number on tons per tree since there are too many
variables (soil, sunlight, species, maturity, etc.).