I'm learning from Genki 1 right now, and working my way through the workbook.
The sentence I'm confused about is this:
I'm already aware of the usage pattern of 『に』 with 『ある』 in terms of locations, such as 『机の上にねこがある』。
Because I've only ever seen 『に』 used with locating objects before, I'm wondering, is it ok to use 『で』 instead in some contexts? I mean, I suppose if it's a sentence in the book then it would be correct lol, but I still feel compelled to ask :P