Talk:Permanent
A permanent need not necessarily be one of the above types. There are circumstances, such as using Neurok Transmuter's ability to remove the artifact type from an artifact being animated by March of the Machines, in which a permanent can be completely typeless.
I believe this information is incorrect. If you animate a creature with march of the machines, it becomes an artifact creature. If you then use Neurok Transmuter's ability it loses the artifact type, but remains a creature. It is not typeless.