Many times on this forum we have seen the words evidence and speculation used to explain the same event such is the difference in the individuals perception. There have been claims that there is evidence that Madeleine was abducted and counter claims that there is no such evidence and what it amounts to is merely speculation. By the same token there have been claims that Gerry was seen carrying a child down near the beach at 10pm yet over time this has been shown to have been untrue since the evidence and indeed the proof places him at the tapas restaurant at that time. What starts out in many cases as evidence of one thing often ends up being evidence of another.
It was claimed by davel that most of the forum is based on speculation but I corrected him by stating that although speculation is part and parcel of many discussions, there has to be a sizeable element of evidence contained within the debate for it to be considered legit. A forum based on truth and justice therefore cannot afford itself the luxury of allowing debates to take place merely on the basis of speculation.
You could say one mans truth is another mans speculation.