[Grammar] Those or them?

[uktous]

Hi,

Question:
Should I say “them or those”?

Sentence:
When I explained some necessary complex ideas, I explained them/those using examples.



My opinion:
“Them” should be correct, and “those” should be incorrect. However, the grammar checking system of MS word suggests “those” is correct.

Thanks

 

[Barb_D]

The correct word is "them" but the sentence is quite repetitive.

To explain complex ideas, I used examples.
I used examples to [help] explain complex ideas.
When I must explain complex ideas, I find using examples help make them more clear.