No it isn't. You also need to know the underlying philosophy of the scientist, his beliefs, fears, loves, and hatreds; his expectations and assumptions about life, and so on.

For instance, Darwin was quite a religious man...that would affect his view of reality and his interpretation of the evidence he gathered and the observations he made. He would most certainly arrive at differing interpretations than a man who was psychologically opposed to organized religion of any sort.

People interpret reality through the screen of their perceptions, not just through gathering physical evidence and viewing it in a completely neutral manner.

A mechanical device is completely neutral and objective, within the limited range of what it can do. A human being is not. The human being has a value system which is quite subjective in nature. Even animals have such a value system....they are full of both affection and prejudice, based on their past experience.

That value system determines:

1. What evidence is even noticed in the first place.

2. How it is ranked in order of importance.

3. And what meaning is given to it by the observer.