>Are the results of these different?
>

>!EOF() OR !BOF()
>!EOF() AND !BOF()
>

For your reference, here is some boolean logic.

First, the easy part, some truth tables. Note the difference between AND and OR, in the second and third rows.

A   NOT A
T     F
F     T

A   B   A AND B
T   T      T
T   F      F
F   T      F
F   F      F

A   B   A OR B
T   T      T
T   F      T
F   T      T
F   F      F

! or NOT has a higher priority than AND and OR, by the way. (While AND has a higher priority than OR, this can be confusing, so parentheses are recommended if there is any possible confusion.)


Also interesting in this case are De Morgan's Laws, which state that

not (a and b) = (not a) or (not b)

not (a or b) = (not a) and (not b)

(Note that the AND is changed to OR and vice versa.)

Applied to the present case, and considering the additional identity

not (not A) = A

your conditions might be rephrased as follows:

>!EOF() OR !BOF() --> not (eof() and bof())
>!EOF() AND !BOF() --> not (eof() or bof())

As stated previously, the first condition can't ever be true if there is at least one record.