I have probably the best record on this site for predictions, ( by my calculation a success ratio of 92%, considerably higher than my nearest rival) but here is one I am certain will be correct.
Actually you will find that I am the best predictor on this board. That is an undisputed fact.
England are even money to win their group, and win it they will. If they lost to Wales then they wouldn't win the group which means that they won't be losing to Wales.
Given my predictions are 100% predictable but not necessarily accurate. I calculate with all due knowledge and foresight that my predictions to be predictably predictable and thus inaccurate .
Draw