Huh? said:
Most people cant switch between sides as you can see. some people can which means they are both. but mostly one side. everyone HAS to use both sides but some people are stronger on one side then the other
Wrong.
EVERYONE can switch between sides of the brain, but unless they can do it at will then it will happen randomly and could only be for a brief moment.
Nobody is stuck to one side of the brain, nor can anybody be both, you can only have control of one side of the brain at a time.
There is no strongest side but generally people are in the left brain more than the right because as I explained before, that's used for more general things.
Take this from somebody who's actually researched this stuff.