This a million times, in my experience I noticed a very strong correlation between "describing things imprecisely" and "I'll be disappointed working with them".

This a million times, in my experience I noticed a very strong correlation between "describing things imprecisely" and "I'll be disappointed working with them". One example that is stuck in my mind is this ex coworker who during the interview kept messing up orders of magnitudes for some quantities during a simple back of the napkin calculation: specifically, he didn't have a clear pulse on the difference between nanoseconds and milliseconds, which is essential in the domain I'm working (system engineering - distributed systems).