Philosoraptor

so theoretically speaking: if you never said a word to a child, and expose it to any form of verbal/written language. It would not be able to think?

That is what many in the field of psychology are saying. Without language as a framework it would be difficult to form abstract thoughts. Human thought would be stunted at a very basic level of emotions, and images.

http://www.uniurb.it/lingue/matdid/donati/LinguisticaGenerale/2006-07/bloom2001.pdf