It's not impossible and people do it all the time. People make ridiculous amounts of money by predicting stock price movement seconds ahead of time and making super short term trades, seconds apart. This is just trying to do it on a longer term scale. And it seems to be working pretty well. Definitely better than any human could do.
It is impossible. And has been demonstrated repeteadly and using different approaches and models. In a 30 year span a coin toss model has the same ROI than the 99.99% Hedge funds.
Then there is Warren Bufett.
Don't mistake the skill and discipline that takes to anticipate tendencies with the magic power of making predictions.
Read this last sentence again.
Bingo ;-)