Trivia: When filming ROTJ, Lucas didn't want anyone to find out that they were shooting the third Star Wars movie, because pandemonium could break out. So when someone asked the crew what they were filming, they said "Blue Harvest". All of the crew had shirts and hats that said Blue Harvest on them. The fictitious film's tagline was "Horror beyond imagination."
Question: Can Jedi and Sith actually read thoughts? In this movie, Vader was able to realize that Luke was thinking about Leia during their fight on the Death Star. If he could read Luke's thoughts, even though Luke is also a powerful Force-user (not a weak-minded person), how come Jedi in the past couldn't detect the thoughts of other strong Force-users? For example, why didn't Mace, Yoda, or other powerful Jedi find out that Anakin was keeping a secret about his marriage to Padme, the way that Luke was keeping a secret about having a twin sister?