According to a friend of mine, 4 is an important number for engineers. This statement is at first strange since my friend, we will call him “Wade”, is not an engineer. How can he know?

But according to “Wade”, one can have a flock of birds, a gaggle of geese, a herd of elephants, a school of fish, but when it comes to engineers:

The set E of a number n of engineers, when gathered together and n is greater than or equal to 4, will create a “Yawning” of engineers.

{E: n>=4} = Yawning

Something tells me “Wade” is making fun of engineers, but I’m still working on that.