Provide one point for and against Turing Test to determine if a software piece is intelligent

For questions $(1-$b$)$ and $(1-$c$),$ answer if forward search $($data driven search$)$ or backward search $($goal driven search$)$ will be more appropriate with one good reason for the scenarios given$$:

$(1-$b$)$ You have met a person Dr$.$ Rajiv who claims to be your distant cousin. You need to verify his claim by finding some common ancestor who is a few generations older.

$(1-$c$)$ A system that will help human to classify plants by species