What Are The Assumptions Of The Law Of Diminishing Marginal Utility?

I can’t figure out if this is an honest question or some moron’s bot-work. The only assumption in marginal utility is that it is a general rule of arbitrary precision like all general rules must be constructed of arbitrary precision by logical necessity.  

So as far as I know, no assumptions external to the construction of ALL general theories are present in marginal utility.  It is just that the distribution of particulars under social sciences are wider that n the distribution of particulars in the physical sciences: man learns. Hydrogen does as hydrogen is, and that’s the end of it.

https://www.quora.com/What-are-the-assumptions-of-the-law-of-diminishing-marginal-utility