If I use the brains cheat can I still unlock the gray matter trophy?

The trophy description says to get 50'000 brains without using the mmm brains cheat. I understood this to mean, you must earn 50'000 brains normally and that using the cheat would not count. However, it seems that people are suggesting that using the cheat invalidates the trophy completely. Anyone know that the real deal with this is. Can gray matter still be unlocked if the brains cheat was used?