General precision parameter. Default value = 3.5, which
is a bit low.
For your final calculation in general a value of 4.5 is advised.
Higher values
(larger than 4.5) should only be necessary in extreme cases.
The tell-tale sign of a too low value is that a binding curve becomes
bumpy.
Values below 3.0
produce unreliable results, due to the limited precision in integrals.
Accuracy plays in fact the role of a very
general accuracy parameter.
It determines not only the generation of integration points
(it is the default of the AccInt key for
the integration scheme),
but also the (default) values of many other
parameters and settings that are related to the accuracy of the results.
