In the text, “unlike” (l.8) means:

Digital Heaven

If you had the opportunity to live forever, would you take it? The obstacles to ________(1) your body alive indefinitely still seem insurmountable, but some scientists think there is another possibility opened up by digital technology: creating a digital copy of your “self” and keeping that “alive” online long after your physical body has ceased to function.

In effect, the proposal is to clone a person electronically. Unlike the familiar physical clones - offspring that have identical features as their parents, but that are completely separate organisms with a separate conscious life - your electronic clone would believe itself to be you. How might this be possible? The first step would be to map the brain.

How? One plan relies on the development of nanotechnology. Ray Kurzweil - one of the prophets of artificial intelligence - predicts that within two or three decades we will have nanotransmitters that can be injected into the bloodstream. In the capillaries of the brain they would line up alongside the neurons and detect the details of the cerebral electronic activity. They would _______(2) to transmit that information to a receiver inside a special helmet or cap, so there would be no need for any wires protruding from the scalp.

As a further step, Ray Kurzweil also envisages the nanotransmitters being able to connect you to a world of virtual reality on the internet. With the nanotransmitters in place, by thought alone, you could log on to the internet and instead of the pictures coming up on your screen they would play inside your mind. Rather than send your friends e-mails you would agree to meet ___(4) on some virtual tropical beach.

For Ray this would be, quite literally, heaven. Generations of Christians believed in Christ partly because his resurrection ______(5) the promise that we too might be able to enjoy life after death. But why wait for the Second Coming when you can have a shot of nanobots and upload your brain onto the internet and live on as an immortal virtual surfer?

Addapted from: http://fullspate.digitalcounterrevolution.co.uk/english-articles-advanced/digital-heaven.html