Anything can technically be the fourth dimension. The thing about dimensions is that they are open to be defined as needed. You can have four spatial dimensions, you can have ten spatial dimensions. You can have ten spatial dimensions and time being an 11th dimension. Its all up to whoever is defining the model being, well, modeled.
Anything can technically be the fourth dimension. The thing about dimensions is that they are open to be defined as needed. You can have four spatial dimensions, you can have ten spatial dimensions. You can have ten spatial dimensions and time being an 11th dimension. Its all up to whoever is defining the model being, well, modeled.