mistaken belief

Jackson volunteered this information to detectives, just before the trial, in the mistaken belief that it would help Wise.

Philologist after philologist has swooped down on Homer in the mistaken belief that something of him can be obtained by force.

Many men and women, in the mistaken belief that they are expressing personality, adopt certain peculiarities of dress.

Softshells generally are condemned by fishermen because of the mistaken belief that they are detrimental to fish populations.

It is the result chiefly of the mistaken belief that the purpose of technical teaching is to give information.

Sometimes it is observed of nearly a white colour; which led to the mistaken belief that Polar bears existed in the Himalayas.