practical vs theory

It strucked my mind dat, the reason why, sometimes theory alone is not enough is because, when u'r practically doing stg, everything, every aspect that theoretically we tend to forget to put into consideration are then put into consideration in practical. therefore, that is why, people with skils, though they might not know what to expect and why isit so, they tend to be able to cope with the situation, because of all the aspects comin, they already know the way to do it.
For example, for theory we consider A influence B
practical. A, E, C and D influence B
A person who has theory, will tend to ignore E, C and D whereas a person with practical is able to cope wth the situation which A+E+C+D= F influence B
so, a person with practical knows that F influence B though he/she might not know that F contains A, E, C and D and therefore, he is able to deal with B. hehez ^^