Based on statistics, we could not possibly be the only intelligent race in the vast universe. Its practically guaranteed. But what people don't realise is that, based on statistics, not only is it virtually guaranteed that we are not alone, its even more likely that we'll never meet them. The amount of planets, vast distances of travel, and relatively short life spans of species pretty much shows that we'll forever be millions of years and billions of lightyears apart from one another, totally ignorant to our mutual existance. At best we should hope to discover signs of life, such as ancient (by the time they reach us) transmissions through space, or perhaps one day primitive wildlife on a planet. As far as alien abductions and UFOs, based on the one in a billion-trillion-trillion odds of another super-intelligent species contacting us and not only that but secretly experimenting on us, the most virtually guaranteed stat of all of these is that the few isolated reports are simply cooks and liars, people with psychological disorders that genuinely believe such experiences happened, and most importantly confidential military technology of various sorts. I mean theres a reason that the hot-spot of all UFO's is a top-secret freaking military base! People don't put two and two together.