You should know this by now , didn't you take that in high school ?
Yes, but high school was a long time ago, my friend...
But I guess the question still remains... What "reagents" mean to BGS ?... Or rather to the journalists who wrote the articles ?...
In "the Witcher" to make potions you have to use a liquid "base"... I don't know if this is in Skyrim or not, but is kind a "realistic" way to make potions (maybe "realistic" is not the best choice of word here)
Oh well, I suppose in November 11 we will see if alchemy has been improved or not.