Subject: What is considered a semi-permeable membrane?

Hello. I'm confused about what constitutes a semi-permeable membrane. I think 
that a Gummi-Bear soaked in water to the point that it expands but retains its 
shape is called osmosis.  My debator claims that it is diffusion and not 
osmosis because a Gummi-Bear does not have a semi-permeable membrane.  But, I 
thought that anything where water is involved is osmosis, but she argues no, 
since the Gummi-Bear can be cut into peices and still have the same make-up 
throughout so it's not really a membrane.  Yet, the water passes through it and 
the bear blows it up and retains its shape so I think that it is osmosis.
Who is right??  Please settle this for us!!

Re: What is considered a semi-permeable membrane?