Jaden Smith -- I'm Not Dead...

Jaden Smith is ALIVE -- very alive -- despite some sick, stupid BOGUS Internet report that he died in a snowboarding accident in Switzerland. Just like Will Ferrell, Adam Sandler, Jeff Goldblum, Urkel and Pat Sajak ... some moron published a FALSE report thinking it would be funny.

But Smith's rep tells us, "It's absolutely not true."

So, there ya go ...