I was just wondering: How does the 5th generation project compare to IBM Watson? (both are expert systems/rule based systems) Was it possible to pull off a syst

I was just wondering: How does the 5th generation project compare to IBM Watson? (both are expert systems/rule based systems) Was it possible to pull off a system like that on 80ies minicomputers? I suspect that the PDP 10 too limited for the amount of data processing required. Maybe one could have done that with rule based systems on a mainframe of the day.