When a person invents something, errors are unavoidable. That's why other people reinvent that technology and develops it to be easier and faster than before.
No, because technology isn't just what people make, technology is also grass, water, etc. Technology is everything in this world, in a way. Trust me when I say this, because I had to do a home work...
If a pieace of other technology is old and want new technology you need to build a new type of technology that you could use and do other stuff like using something old and making it new!
technology is the sciencetific knowleadge(eg:I-PHONE)technology makes human live easy like phone we dont need to go to friend house and tell him just call him thats technology can do*