No False Belief Condition

This notion was presented early on to counter act the Gettier problem. It simply stated that the belief X (as in the example above) must not be caused or based on a false belief. This was found to be too broad and yet too restrictive.

Cases could be posed where things that should be known (due to Justified true belief) are not; things that ought not be known (due to justified true belief) are. Consider the above example with Mrs. Knoll's clone secretary.