The belief was not based on knowledge of Europe and failed in practice.

This is the major premise on which belief and practice are based.

His belief was based on the analogy of plant life.

My whole belief in life was based on the fact that Ellie loved me.

Such beliefs may be based on gender, education, and ethnic background.

Their beliefs are based on traditional narratives that tell how and why things exist.

And yet this generally held belief was based on just one dramatic observation.

But my belief, and that of those whose interests I represent, is based on other criteria.

Ms. Lee's beliefs are based on some degree of truth.

But it is my belief, based on very thin evidence, that this just could be the one.