Precision of Language.

Precision of language is important:

Uncertain Principles: Vaguely Relevant Geek Joke: A colleague mentioned seeing an oral exam in which a student worked through a derivation on the chalkboard, and ended up with has answer having the wrong sign. "I seem to have made a sign error," he said. "No," corrected one of his professors, "you seem to have made an odd number of sign errors."

[Semi-Daily Journal]

Sometimes it is hard to be precise without an outside perspective. That is one reason why having a diversity of viewpoints is so important.  12:59:45 PM