You are thinking in terms of code. I'm thinking in terms of knowledge. What you ...

stcredzero · on April 13, 2009

Using a lib can get things done. Sometimes you have to get things done now and have to come back to understanding the problem in depth later.

Debugging through someone else's library is often a great way to do that. (Provided your language/environment's debugging support is good enough.)

GHFigs · on April 13, 2009

Sometimes you have to get things done now and have to come back to understanding the problem in depth later.

This is a great way to create whole new problems.

jrockway · on April 13, 2009

Do you know every implementation detail of the database management system you use?

The fact that proprietary databases exist means that you can use libraries without understanding all the code in them.