This first photo depicts something bad that has a toxic agent that acts on the central nervous system. The red and white pattern depicts a good appearance.
|Fly agaric toadstool|
Although jelly fish are beautiful (good) to see moving in the water, their sting can feel very bad. (Note: Some claim that washing the area of the sting with salt water helps relieve the pain.)
When this plant blooms, it is covered with an abundance of yellow blossoms (good). When it first appeared in this country it was introduced as an ornamental flower, and then was used to stabilize hillsides, but it didn't take long for it to be recognized as an invasive plant. It is a bad plant because it will take over your property, and some people are allergic to the flowers.
These two very old pans I've identified as bad. One is an aluminum pan and the other is stainless steel, but has one of its handles missing. Some countries don't even sell aluminum pots and pans now. Cooking foods with citric acid in an aluminum pan isn't a good idea. Although the stainless steel pan has the one handle missing, there is still a little piece that one can use to hold the pan, so I still consider it useable or good, if you are careful to hold on to both the good handle and the nubbin of a handle.
|Old aluminum pan and old stainless steel pan|