It is, in the second-to-last paragraph of “Production:”  “Any partial units produced are wasted.”

Yes, but this is a glossary. In general, it is a good idea. Just incase the ruleset does not say anything about it(like “units may be fractional”), then this is a good rule of thumbs to follow.

With ‘Provisions in the text of the Ruleset supersede this entry.’ I think it’s ok. I said no at first since I thought it would make my Daemon I was trying to manifest obsolete, but now that I have sent it back into the darker realms, 

This new wording seems slightly more dangerous, as a generic case; a casual future mechanic that allowed players to halve or quarter certain variables could allow unintended exploits - awkward fractions seem less exploitable than disappearing numbers.

My thoughts, when I proposed this, were:
There is a potential for abuse without this rule, for instance if amount of an attribute was not calculated by amount but by number of decimal places. We had better have a default that doesn’t allow for imaginary/irrational numbers. And it’s a good thing we can’t allocate negative amounts of production, because then we’d have to worry about i.

It might be useful to define what happened if the ruleset tried to take a square root of minus one, or divide a number by zero (I’m not sure if it’s ever happened before, or what we did), but we’d need something more effective than just rounding to the nearest whole number.