[bennyhana]

I think it is the principal. What I'm getting is, if no one has opened, meaning there are 1 or 2 limpers, in a tight game you should raise to isolate the limpers and play hands like JJ vs one or two opponnents. In a loose game, if there are 1 or 2 limpers, you should also limp to try and keep the hand as multiway as you can.

I don't think that applies to todays online game. FWIW, I raise JJ in any position and with the right information, I will 3 bet and sometimes cap.

I think what you need to get out of said paragraph is the concept of playing certain hands vs many players or vs fewer players. I'm not sure why they chose to limit it to just JJ. I think big offsuited Aces and medium pairs could fit that mold too.