Ah, but McCoy's tricorder was the product of eight years or so of innovative advancement since the time of STDisco.Thing is, what about the things that gave Darvin away? Things like irregular heartbeat and body temperature? These are things McCoy picked up with a simple tricorder, while Tyler was scanned by one of Starfleet's most advanced shipboard medical computers at least twice without anything being noticed, and it wasn't until the third time that something was picked up that warranted "further investigation" at which point Tyler kills Culber. And to make things worse, the writers tried to claim Tyler underwent the same process as Darvin, so how does a medical computer aboard a science ship repurposed for combat somehow miss a patient's irregular heartbeat and body temperature twice when someone with a tricorder can pick up on these things right away?
To say nothing of the fact that Tyler was obviously never in Lorca's ready room or else Lorca's pet tribble should have exposed him right there and then. Just how likely is it that Lorca never had one of his department heads in the ready room?
Kor