Precognition can consist of the objective (probability/coincidence, sublimal cues and physiological warning dreams)..
On the subjective, there can be the possibility of "Time & Space Continuum", actual precognitive abilities, or even God...
However, the topic is subjective and I don't see researchers finding the truth in "precognition" anywhere in the near future... But in my opinion, it could be a mixture of both the subjective and objective.. It is difficult to assess these claims(the subject may leave out important subtle details on his claim due to his own bias and ego defense, some precognition occurences are more narrow and precise than others that are more general, and this phenomena happens in real time so to implicate findings in laboratory settings would take a miracle itself...
Anyways, if you guys are interested in the idea of "pre-cognition", you should look into the theory of synchronicity by Carl Jung...