The Scientific method of obtaining facts are by the Elements of Empiricism ,Determination ,Parsimony and Testability.
When knowledge is derived from later stages of parsimony it may not easily be recognised and classified as speculation and not scientific.
Example ,if the assumption of 2 people as being in a room is solid( parsimony),I need not observe directly( empicism) to infer that the number of people in a room is 1( determinism) when I have information that 1 person has left the room( truth).This truth is repeatable despite location( Testability).
Should one work with inferences ( Principles that have been attested),are the products thereof not scientific enough.
Fixation to the direct basic elements of scientific method as the proof of an outcome being scientific may be an error.
Are the supra observation bias laden?
Critique.