Rocketman wrote:I don't see why this is so difficult to grasp. "My blood was tainted" -> Need pure blood to go SSJ4 -> Hybrids don't have pure blood. -> Hybrids can't go SSJ4.
It's that second part where you go wrong. There's nothing said about his blood being tainted
by a parasite baring any resemblance with genetic markers.
[ Vegeta has a parasite > he said that was the reason he couldn't go SSj4 ]
That's all we have. By your logic we could say [ Vegeta has a parasite > he got white hair > anyone with white hair cannot become a SSj4 ]. It's completely asinine.
Let's look at other possible factors:
Gohan: half-Saiyan > known personally to go SSj2 > half-breeds known to go to SSj3.
Vegeta: full-Saiyan > known personally to go SSj2 > full-bloods known to go to SSj4.
Baby Vegeta: full-Saiyan infected with parasite > could not even transform into SSj properly.
From this we can surmise that it's not just SSj4 that is affected by Baby, but
all SSj transformations. Nothing to do with how 'pure' his blood was.