Q; Why can't La Forge detect that Rasmussen is lying via his visor, through which he can detect physiological reactions associated with lying?
A; I would imagine that it is because he is from a different time. People are still evolving, you know.
Q; Why would Picard keep Rasmussen in his (Picard's) time when he was aware that the past might be changed through that act?
A; We might assume that Picard decided that that course was preferable to letting Rasmussen carry on running around with a time machine at his disposal.
Incidentally, when we first see the Enterprise at the very start of the show, she is clearly at warp. Picard intones that she is on her way to try to help overturn an ecological disaster on Penthara 4. Why then, do they not continue at warp once they have picked up Rasmussen and his ship? Peek out of the windows in Picard's Ready Room while he interviews Rasmussen, in the Observation Lounge when Rasmussen chats with all of them, and in Rasmussen's own quarters when Data takes him to them. The ship is clearly not at warp. Why not? Weren't they speeding to avert a terrible disaster?
Redemption Two Darmok Ensign Ro Silicon Avatar Disaster The
Game Unification One Unification Two
A Matter of Time New Ground
Hero Worship Violations
The Masterpiece Society Conundrum Power Play Ethics
The Outcast Cause and Effect
The First Duty Cost of Living
The Perfect Mate Imaginary Friend I Borg The
Next Phase
The Inner Light Time's Arrow Part One