Murphy's Law: If something can go wrong... it will go wrong!
Other great examples of Murphy's Law are:
- As soon as you find a product that you really like, they will stop making it.
- If you don't feel well, make an appointment to go to the doctor because by the time you get to the Doctor's office, you'll feel better.
(based on the idiom "putting your foot in your mouth")
Giovane, it's not about pessimism. It's about collective observation.
Pessimism means always fearing that bad things will happen in the future. This fear is due to one's own personal, individual bad experiences that one has lived.
Murphy's Law means that human beings have collectively observed things that have actually and repeatedly happened in the past, and have remembered them and put their collective experiences together to draw a humorous yet true conclusion.
When you think of your car is reliable, defects start to happen one by one.
When you hope you spend a nice weekend with your wife, the quarrel starts and brokes all plans.
You never leave work before 5 pm but one time you must go without permission of your boss. He never checks anybody but in this day he accidentally sees you and your reputation is diminished.
There were general situations which can happen. Now I recalled real once: I omitted lectures during my secondary school hardly ever, however, one day I decided to leave the school without permission and go to another city as I knew that my teacher won't be present. I wondered without a goal and in one moment I saw as I go straight ahead, my teacher. I turned back and disappeared into the crowd of people.
I was amazed how it was possible to meet somebody in another big city in the same place and time. All people I would be happy to meet in spite of this one teacher. But I met just her. It was pure Murphy's Law.
Your understanding is correct.
When my car is making a noise, when my computer won't boot up, when the television won't show a channel, AND when I take the car to the mechanic, or take the computer to a technician, or have someone come to my house to fix the TV... the noise in the car will disappear before the mechanic can hear it, the computer will boot up when I turn it on, and the TV will work fine when I show the repairman that it doesn't work... :) Murphy's Law :)