Well , I mean , because  everything uh  If you have a system based on Gaussians , everything is based on means and variances.
Yeah.
So if there 's an overall  reason  You know , it 's like uh if you were doing uh image processing and in some of the pictures you were looking at , uh there was a lot of light uh and  and in some , there was low light ,
Mm - hmm.