Tell me, if an explosives sniffer dog reacted on the plane you were about to board, would you?
If a dog trained to sniff out cancer on your breath gave a signal, would you get yourself checked out?
If your own dog kept sniffing one your moles would you get it checked out?
If you answer no, yes and yes .....?
The scenarios you cite are not comparable because your examples are simple to check
1 A plane can be searched -. Either there is a bomb on the plane or there isn't.
2 You can take tests. Either you have cancer or you dont .
3. Your mole is able to be tested and is either benign or malignant. 1
.
Not so easy with an alert from a cadaver dog because with only a scent and no physical material residue to test you cannnot know......................................
1. Whose scent it is
2. Whether the scent was deposited recently or decades ago.
3. Whether the scent was from that spot or brought in from elsewhere by cross contamination
4. Whether the scent is from above ground or below ground.
5. Whether the scent is from that spot or has drifted from elsewhere and collected there.
6. Whether it is residual scent from decomposed body bits, i.e. fingernails, teeth, hair, semen etc. from a living person, or whether it is from an actual cadaver.
Which is why Martin Grime makes it clear that because of all those variables, without corroborating (testable) evidence it is not possible to prove whether a cadaver had ever been there or not.