Trade-off Triangles

It seems there are many places where we can encounter trade-off triangles. This is the simple idea is that somethings are characterized by three desirable attributes. And that you may select for only two of the three.

For instance:

• Rennovations can be high quality, performed quickly, or inexpensive.
  
• Security systems can be high security, convienient, or inexpensive.

I'm sure I've seen other examples of this in the past.

The best inventions are found ...

... where the path of least resistance leads through creativity.

The condition known as "Compound Ignorance"

In which the afflicted doesn't know they don't know.

(An expression used on occasion by my father.)