Computers can totally tell if you are confident about using it or not. They can also tell if you disrespect them or treat them poorly.
I've seen this several times. User complains that computer is slow, common functions don't work, random and unpredictable failures, etc. as soon as a tech joins, the problems disappear. This isn't just a matter of idiot users not knowing how computers work, because I have hung around with those users to observe the behavior. They are not lying, the computer will exhibit random and unpredictable problems. But as soon as a technician touches the machine it behaves well.
I've also done more than my share of after hours on-call rotations. I've learned that if you believe that you will get no calls, you will get no calls. If you believe you will be swamped by calls, you will get calls out the ass. Discovered this by accident when I came in one Monday to discover I have been on call for the last week and not received a single call. This actually led me into LoA and how your consciousness shapes your reality. I would have dismissed it all as bullshit if I didn't have first-hand experience.
>>31936that's all electronics, not just computers