Today I had the pleasure of adding a feature to our intranet service written by two of my colleagues since they suffer from severe unix dyslexia. One of them was sick so I sat down with the other one and somehow he didn't know how to interpret the output, how to correctly call it from the terminal or even which parameters are needed for it to work so I had to try and decipher their code.
How can one work on something for a month and not know anything about it?