All the evidence we come across in real life is faulty to a greater or lesser extent; and the only question of importance is how good the evidence is; not whether it is perfect or imperfect. Evidence is a matter of degree.
G. N. M. Tyrrell

The Photographic Protocols

In view of the anticipated criticisms relating to phenomena produced in total darkness, Professor Fontana suggested a four-step protocol so that the investigators could control the point at which the photographic images were actually produced. First, the investigators would provide the film to be used. Second, the investigators would ensure that the film was in a secure container, provided by them. Third, the investigators would have control of the container throughout the session.

Finally, development of the film should be under the control of the investigators. According to The Scole Report, `Such a protocol would remove any possibility of physical intervention. Neither the Spirit team nor the Scole group offered any objection to this protocol.

We should remind ourselves at this point that the Scole group had already been conducting experiments in photography and had a stock of various types of film which had been kindly provided by Polaroid.