>>13786855 (lb)
Dealing with highly classified material.
Often times the "facts" or parts' lists of classified material are not classified, but the "Keystone" information that forms a usable, functioning whole is.
Keystone is left for us to discover, not be told about.
Re: disinfo... sometimes knowing what something can't be is as important as knowing what it could be. Disinfo could point us in a direction we didn't think of looking in without divulging true information that was highly classified. If true, then b, if not true then c. Denotes a vector change, but leaving the exact vector direction unsaid, for classified reasons. Later events would indicate if the direction we assumed was correct or not.
E.G., you're in the woods with a map, at a crossroads. Not sure which direction you're facing because you don't have a compass. From the map, there's a pond a mile away if you go one way, but nothing in any other direction. You haven't seen a pond thus far. Only way to know where you are is to pick a direction and see if there's a pond. Have to return if there isn't.
IIRC, Q talked about that early on.