T or B

Today I was quite perplexed as I had the choice of using the word "motile" or "mobile." In essence I thought they meant the same thing and to a degree that is true. Here is what m-w.com had to say:

mobile-
capable of moving or being moved

motile-
exhibiting or capable of movement


so it sounds like one can be both motile and mobile if you can move on your own but only mobile if you can move, but with assistance

i'm still slightly confused.

-S