can man makes machines which have self thinking power?

Answer 1

It depends upon what you mean by "self thinking".

If you mean independant thinking and reasoning I would say no.

If you mean limited ability to detect and change, I would say yes. Examples of this are:

1. electric motors that shut down when they overheat; the temp exceeds a setting and the unit stops rather than burns out.
2. circuit breakers that break the circuit when current rises above a set point.
3. a furnace thermostat that turns the furnace off and on at set points
4. an auto thermostat shuts down for a cold engine, and opens partly as temperature rises until it opens fully

Computers have made this even more sophisticated and multitiered. In all cases however, it is human thinking that dirrected the device to follow certain actions depending upon conditions observed. Therefore the machine actually follows a directive rather than thinks independantly. Most people who really do not want to think deeply, do the same sort of "lead following" however and consider it self thinking.

Answer 2

Highly impossible

Answer 3

NO, it hasn't been done!!