Much of one's understanding of the action depends on pre-existing knowledge of "Tom Sawyer."

It is primarily based on observation, although pre-existing knowledge influences how we perceive an observation.

A combination of scientific understanding with common associated social themes anchored by pre-existing knowledge will have a significant impact on the future hydrogen policy.

Teachers are the epistemological authority in this system; students' pre-existing knowledge is ignored, aside from what was expected to be 'deposited' into them earlier.

New discoveries are acquired through various senses and are usually assimilated, merging with pre-existing knowledge and actions.

In the future, he suggests, scientists will refine, extend and apply this pre-existing knowledge but will not achieve any more great "revolutions or revelations."

This is possible only by virtue of "pre-existing knowledge."

Thus, theoretically, as they continue building knowledge off of their pre-existing knowledge in isolation, their view of the world could slowly become skewed from reality.

Yet even these others (researchers) have to be given a direction and that direction can only come from some pre-existing knowledge in the field.

These theories attribute the source of the ambiguity aversion to the participant's pre-existing knowledge.