Original sentence: A feature with plasma cosmology is that it depends on physics which is well understood.Because the Alfven model depends on physics that is well known, it cannot be modified to fit any basic random theory to fit unknown observations.Because the other models involves physics that are poorly understand, they are adjust based on whatever can fit the current observation by invoking exotic physics, such as a new particle or an unknown field.From a theoretical view, plasma cosmology has not been formalize to the point where it is possible to perform numerical simulations similar to those now routinely performed to model the behavior of early galaxies.There are a conflicts and computational hurdles within the plasma cosmological model
Edited sentence: Another problem with the Alfven model is ironically that it depends on physics which is well understood.Because the Alfven model depends on physics that is well known, it is much harder to modify the basic model to fit known observations.Because the standard big bang model involves physics that is poorly understand, one can adjust a model based on the big bang to fit observations by invoking exotic physics, such as a new particle or an unknown field.From a theoretical view, Alfven was unable to formalize his model to the point where it is possible to perform numerical simulations similar to those now routinely performed to model the behavior of early galaxies.Unfortunately, there are a number of problems with Alfven's model