If i said there was an "unexpected rise" in accidents with one design,
This statement in itself is just an opinion, an anecdote, I don't see any rigorous statistical/probabilistic analysis that in fact one can deduce that there was any such 'rise', and even it was it could then be attributed to whatever cause rather than being a statistical 'noise'. Probabilistic events can naturally occur in clumps, I can walk into a casino and observe roulette 'red' going 10 times in a row, not enough to deduce that the game is rigged or table is faulty. So the "professional" thing to do is to a) prove that in fact there is a 'rise' that can't be explained by a statistical noise b) that the 'rise' has anything to do with instrument design.