I have no idea what you are trying to say. Could you try again?
In a nutshell:
Impericism by itself is not to be accepted as fully-knowing (or even attempting to be such). Other philosophies must be employed in conjuction with science if one wishes to actually "know"
This would be in opposition to being a witness to things. The witness knows what they saw, but do they, by default, know what happend? No, they have an incomplete picture.