>>>>>It's anyone's guess whether the user will or will not know what a specific word means, but my bet would be that it's more likely that the average human (not programmer) will know what "negative" means than what >= 0 means.
>>>>
>>>>"Greater than or equal to zero" is simpler vocabulary than "negative"
>>>
>>>If that works for you, Mike, enjoy it!
>>
>>I find no joy in the idea that my users occupy the section of spectrum between "illiterate" and "morons". Unless it pays reeeeeally well.
>
>I haven't met any users who aren't pretty sharp in a long, long time.

But did you check whether they knew what "negative number" means?