[Base-level bias must exist in social science experiments because the researcher defines the thought experiment3a that stimulates a response in the subject1a.
The response (the upwelling of potential in the subject1a plus the potential of the survey to impose constraints1b) always conforms to the stimulus (the normal contexts3a&3b that the event occurs in).
This also explains why many social scientists rely on deception. Deception has the same character as bias. All experiments exhibit ‘base-level deception.]