probably
This presents a certain permutation of possibilities.
Reversing the tendency to proclaim a definite 'without a doubt'.
Strikingly different from a history of stating exactly that.
There must be some scientific actuarial that could be employed to determine the odds of someone who has no apparent reason to kill a national leader as opposed to his being framed by those who had sundry reasons for killing this same leader and recruiting all the required nuances that the case involved.
Probably, Oswald most likely didn't do it.