Steven Universe - "When Steven says he isn't Rose Quartz"

"Rose's weapons + Rose's Gem + Rose's followers = Not Rose?!?!?!"

That is the point though. A lot of people think Jasper (As well as Bismuth and Eyeball.) is dense for not getting that Steven isn't Rose, or question why she can't figure it out. But it's easy enough to see why.

The concept of a hybrid would be next to nonexistent to most Gems. Especially when transforming is a thing with them. Hell, even Pearl's had her moments where she's thought that Steven and Rose are still the exact same.