I am inclined to think that externalist accounts of knowledge such as Dretske’s and Nozick’s lead to a distinction between knowing that p and knowing that p is true. A recent paper prompted me to write a response in which I try to explicate this idea. Does it sound plausible?
The legendary epistemologist, who was a central figure in bringing the concept of information into philosophy, has sadly passed away.
Here is some information on Dretske at ‘New APPS’: http://www.newappsblog.com/2013/07/fred-dretske-1932-2013.html