Is knowledge also a belief?

Science also depends on definitions. If scientists try for example what you call the “pinpointing differences in belief and knowledge, or not”, then they have to begin with the definition of the words „belief“ and „knowledge“ - regardless whether they want to or not. So scientists can always find or not find what they want to or what the politicians want them to find or to not find.

Sapere aude! Have the courage to use your own mind - as Kant said (translated by me).