First of all, one cannot observe the past. Items in the past may be remembered by some, but they cannot be seen, smelled, heard, tasted, or sensed in any way. Observation is an activity in the present that requires the use of the senses.
Secondly, one cannot predict the past. Prediction is an activity in the present that looks to the future, not the past. An attempt to use the scientific method to determine what happened in the past would be “retrodiction.” “Retrodiction” is a neologism for good reason: science cannot “retrodict.” This will be explained subsequently.
Thirdly, one cannot design experiments or controlled observations to determine what happened in the past. Experiments or controlled observations might help one see if a situation is possible or not possible under a set of defined circumstances, but one cannot design an experiment that will replicate the complex variety of conditions that existed in the past — conditions that are often not known in full detail. An experiment or set of controlled observations also cannot provide information about the order and timing of past events.
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Secondly, one cannot predict the past. Prediction is an activity in the present that looks to the future, not the past. An attempt to use the scientific method to determine what happened in the past would be “retrodiction.” “Retrodiction” is a neologism for good reason: science cannot “retrodict.” This will be explained subsequently.
Thirdly, one cannot design experiments or controlled observations to determine what happened in the past. Experiments or controlled observations might help one see if a situation is possible or not possible under a set of defined circumstances, but one cannot design an experiment that will replicate the complex variety of conditions that existed in the past — conditions that are often not known in full detail. An experiment or set of controlled observations also cannot provide information about the order and timing of past events.
Glad to help!