Real World Knowledge Can Limit Understanding of The Force

 Freeman Grey - 

Muhammad Rasheed - She was not a master of The Force, so her innate sensitivity didn't move him. What Darth Vader incorrectly thought he knew of Leia's background at that point prevented him from connecting any Force sensitivity dots swirling around her. Only during Return of the Jedi (1983) did he realize what those Force connectors actually meant, when Luke gave away his own feelings for her while in hiding.

J. Richard Stevens - Darth Vader didn't sense that Luke was his son in the same movie?

Is he supposed to have some kind of force sensitive paternity testing power?

Muhammad Rasheed - @J. Richard... Vader seemed to realize that Luke was his son pretty early on, sometime during the Empire Strikes Back (1980), at least.

J. Richard Stevens - @Muhammad... well, if you read the comics, you can find out exactly the point when he did.

But my point was that he could tell Luke was strong with the force, but had no idea of his parentage.

So the real question should’ve been whether Vader sensed force sensitivity in Leia, not why he couldn’t tell she was his daughter. 

Muhammad Rasheed - J. Richard wrote: "well, if you read the comics"

No, thank you. I only care for the first 3-films and to a limited degree, The Phantom Menace. The rest of that material is of bad fan-fiction quality and irritates me.

J. Richard wrote: "So the real question should’ve been whether Vader sensed force sensitivity in Leia"

Considering the Jedi and Co. are always commenting on how sensitive non-Force users are "strong in The Force" and "The Force is strong with this one," et cetera, this doesn't appear to be a serious question at all.

See Also: 

Batman versus The Force by M. Rasheed

"If You Only Knew the Power of the FORCE." by M. Rasheed

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