Practical space travel

the line? There is no line, but at 50/50. Obviously when a person is no longer a biological entity in majority, it ceases to exist as a human.

 

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Well, no, that's not obvious at all. For starters, do you mean 50% by weight, by volume, or something else?

Now consider a human body with a dumb computer instead of a brain (say the computer can maintain involuntary functions like heartbeat, breathing, and reflexes, and control the body via commands from a remote control unit)... the resulting entity is mostly biologically human, but is it a human?

What about someone who has had bits replaced one by one due to a number of accidents. The difference between more or less than 50% might depend on whether they wear a removable prosthesis. Do you think that they would be a human without their prosthetic arm, and not a human with it?

 

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what about someone who had a human brain in a mechanical body (well maybe a mechanical jar

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). they still think as a human does, they may even still feel as a human does.

So what makes them non human?

 

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quick question abouth this if you would actually travel at c then all the universe would be in a single point and to you as the observer there would be no time.

How would this differ from pre big bang conditions?

 

the only difference it would make is that you have to be moving through space to be traveling at that speed, or else there is no room to travel at any speed what-so-ever, and there is no space in the pre big bang theory