You pass no matter what because all the choices are 'human' answers. I get that it's a throwback to the GOAT, but I wish they would have thrown in a speech check that would lead him to believe that you are a synth.
Inside Covenant, players can find a few things that raise suspicions, like an abandoned bed roll, a note that talks about the rules of Covenant and how not to talk about Synths, and self-help books.
Visitors to Covenant are subjected to a psychological test, called the SAFE test.
Inspecting Amelia's body after death reveals a synth component on her corpse, meaning that she was indeed a synth.
Inside Covenant, players can find a few things that raise suspicions, like an abandoned bed roll, a note that talks about the rules of Covenant and how not to talk about Synths, and self-help books. Yet, none of this leads to concrete evidence of the fate of the caravan's survivors, or Covenant's involvement.
If you destroy the institute, the covenant quest chain no longer starts. You need to acquire the settlement earlier in the game.
The SAFE test is a screening entrance exam required to gain entry to Covenant and is used to monitor those who pass through the settlement. Officially, its purpose is to keep the "undesirables" out, however, its true purpose is to root out potential synths.
Take The SAFE Test Players can answer these questions however they would like, whether their responses are cruel, compassionate, or neutral, it does not matter, as there is no way for players to fail the test.
It is impossible for the player character to fail the test. Unlike other settlements around the Commonwealth, Covenant is surrounded by tall concrete walls sprinkled with defensive turrets, and the houses and the yard are in pristine condition. The Sole Survivor even mentions how everything looks almost pre-War.