[PurpleRamen]

> For starters I would like to have a chatbot who knows the scientific literature in a certain field,

You can feed it with whatever you want. How much censoring (of what exactly?) happens, is up to you.

> Then I would like to be able to ask questions which are answered with pure scientific facts only,

That would demand a very deep level of understanding, which AIs today are not able to deliver.

> Without ever answering with "...this is not scientifically proven, but the consensus is..."

That would not be scientific. In the first place, to understand the scientific literature, one needs to evaluate them and rate their value and how reliable they are in the greater known picture. Just taken them blindly would be worthless. That would be just connecting the words and believing that this is science. That's what all LLM basically already do, and the reason why they lie/hallucinate.

And evaluating texts and putting them into a proper context is not censoring, if this is your impression.