My view is that consciousness, the seat of "personalness," is the ultimate reality, and is also scientifically impenetrable. In other words, there is no scientific test one can postulate that would definitively prove its existence in another entity. We assume that other biological human persons, at least those who are at least acting conscious, are indeed conscious. But this too is an assumption, and this shared human consensus breaks down when we go beyond human experience (e.g., the debate on animal consciousness, and by extension animal rights).
Ray KurzweilBy 2009, computers will disappear. Displays will be written directly onto our retinas by devices in our eyeglasses and contact lenses.
Ray KurzweilIn 1999, I said that in about a decade we would see technologies such as self-driving cars and mobile phones that could answer your questions, and people criticized these predictions as unrealistic.
Ray KurzweilDeath is a great tragedyโฆa profound lossโฆI donโt accept itโฆI think people are kidding themselves when they say they are comfortable with death.
Ray Kurzweil