"Anything that can go wrong, will go wrong".

From an inventor's viewpoint, this is ultimately an argument for keeping things simple and focused on a single task. The simpler an invention is, the less scenarios need to be considered and tested.

Another way to understand it is as though you are living in the future looking back at a problem that occurred:

"If something went wrong with your invention, it's because you didn't do anything to prevent that scenario from happening".

Examples of things you could have prevented but didn't, and thus went wrong:
- The electrical cables burned the house down because the load was too hot. This could have been prevented by adding a fuse, but you didn't.
- The water heater exploded because it didn't have a pressure release valve, which it could have had, but didn't.
- The door fell off the plane when it went upside down because the hinge pin didn't have a lock, which it could have had, but didn't.
- The Earth shifted and caused cracks in the clay pipes under the house, which could have been prevented if flexible piping was used, but it wasn't.

Again, ultimately this is a reminder to keep your invention as simple as possible. It's often tempting to keep throwing new features into it, to make it appeal to a larger audience or solve more problems, but every new feature creates new, untested possible outcomes which can be hard to predict. Hard to predict that is, until they've happened, which they will.
Inventor 1: I created a lightswitch! It has 2 possible states: on or off. I'm aware all of the scenarios that could exist!

Critic: Great, except I see you used iron on the connector pins. Did you account for the corrosive reaction if copper wire is used against the iron? Murphy's Law dictates that it will happen at some point, because it could.
by pjayyy April 11, 2019
Get the Murphy's Law mug.
The secret of the universe: The Universe is intrinsically dystopic.
During a workshop on "Murphy's Law", the shit hit the fan.
by Kerb November 29, 2004
Get the Murphy's Law mug.
1.Complex set of laws about disasters, but leads down to "Anything that can go wrong will."
2. Not fucking Mrs. Murphy
1. My computer died and took my term paper with it!

2. Man, you gotta hide me, Gennady, I just boned Mrs. Murphy and Mr. Murphy has the gun!
by Not so super DJ Gennady September 12, 2003
Get the murphy's law mug.
Murphy's Law

Any bad shit that seems to want to happen will happen no matter what the fuck you do about it! I beleive that the problem gods are a result of this.
Example of Murphy's Law

"If you piss off the problem gods......
Well dont piss off the problem gods."
by Richard Porter September 24, 2006
Get the murphy's law mug.
The law that Eddie Murphy will never again be funny until he goes back to Saturday Night Live. The good one, from the nineties. Start working on that time machine, Mr. Ed.
MR. ROBINSON'S NEIGHBORHOOD
"I spent the day/ making a friend/ for life/ too bad/ i was making it with/ the land lord's wife

Others:

WHITE LIKE ME
BUCKWHEAT SINGS
BUCKWHEAT GETS SHOT
BUCKWHEAT DIES
by Radioman December 2, 2003
Get the murphy's law mug.
The life that of Jenifer Ives. What ever possibly could go wrong, will go wrong. All life long. Period.
Having a day of complete disaster? Murphy's Law could apply here, I mean you're having a Jenifer? Happens to others from time to time.
by Sunkye January 2, 2017
Get the Murphy's Law mug.