Question: In [this answer](https://ell.stackexchange.com/a/185/54), Liam W said [emphasis added]

> 
> 'A Japanese' **infers** the Japanese person is a thing, and not a person.
>  This is what **deems** it offensive.
> 
> 
> 'A Japanese Person' **infers** the Japanese person is just that - a
>  person, and is therefore considered fine for use.
> 
> 
> 

While not wanting to go [this far](http://xkcd.com/1133/) in using simple words, should we try to use simple and common words that are easily understood by people learning English?

An exception to this would be technical terms to do with English, such as "split infinitive". They should still be used, because it is easier to google for "split infinitive" than "boldly putting a word between "to" and the verb".

Answer: 
Any time we write, we should keep our audience in mind. Writing simply and clearly is always a good writer's goal – no matter what they are writing about, and no matter who they are writing to.

As I write on ELL, I'll be assuming that the primary audience is intelligent adults; I plan to write accordingly. That said, I'm also aware that many members of this community speak English as a second or third language, so I'll try to be careful to clarify terms that might be hard to interpret.

That said, I think we do a disservice to the members here if we try to oversimplify the words we use. Presumably, many of them are here to improve their English. I always avoided "baby talk" when my children were younger, figuring that if I always spoke to them as if their vocabulary was limited, their vocabulary would remain limited. In a similar way, I don't think we should worry too much about restricting our language to "simple words." Deliberately using esoteric vocabulary would be a mistake, too, but that's true whenever and wherever we write.
Do not avoid them in contexts where the meaning can be inferred from that context. That is the best way for users to learn them!

OTOH, definitely avoid them if not knowing their meaning will make given answer confusing - when the meaning is not apparent. Alternatively, reiterate, rephrase the same thing using simpler terms to make it clear.

In the example case both bolded words are used in context that makes their meaning fairly apparent, so there is no harm in leaving them in.