The phrase "justified belief" refers to having a rational reason or evidence to believe something is true. It means that you have a good enough basis to support your belief and that it is logically reasonable.
Sentences with «justified belief»
You simply can not justify belief in god by trying to define the name of those that don't believe. (religion.blogs.cnn.com)
An Atheist says we are hear by accident but can not justify their beliefs of right and wrong. (religion.blogs.cnn.com)
So sad when believers try to justify belief by using false science. (religion.blogs.cnn.com)