There are 2 good ways to do this. One is the smell. Fish smells fishy, yes, but bad fish smells really bad. There is a difference in the smell if it is bad. Second, the color. It will have a greenish color if it is really bad.
You know when french onion dip has gone bad because it has water on the top.
when it does not work
I don't know, I'm not a fish...
you know when you are not cotrolling the car.
check it
If you eat it and then throw up. ;)
If it is stale and a very light brown and nothing grows on top of it, then you know you have bad soil.
It as a dark color and it emits a bad order that is easily recognizable
It will probably smell bad or have a noticeably weird flavour to it.
Swap it with one you know is good.
no,of course not!
Well it all depends if the sound of the engine is abnormal or muffled then it prolly gone bad and if it dont start then well you know its bad