Human Error

Human Error is a quest in Fallout 4.

Detailed walkthrough
The Sole Survivor might hear about Covenant from settlers or a passing trader, which will put its marker on the map and a quest entry to "Investigate Covenant". Upon approaching the gate, the Sole Survivor is greeted by Swanson. He explains, that to enter Covenant, visitors have to pass a test to filter out "undesirables". By pressuring for information and successfully passing increasingly difficult speech checks, details about synths and The Institute could be learned. Swanson will be adamant about administering the SAFE test, to make sure the Sole Survivor is not a synth. After taking a seat at the table and answering all the questions, the gate to the settlement will open up.

Contrary to other settlements around the wasteland, Covenant is surrounded by tall concrete walls peppered with defensive turrets, and the houses and the yard are in oddly pristine condition. The Sole Survivor even mentions how everything looks almost pre-war. Speak to Honest Dan. He'll explain he has been hired to investigate a missing caravan and find Amelia Stockton, the missing daughter of the prominent Stockton family. He also suggests the inhabitants of Covenant might be involved in both cases. He also offers to split the reward in exchange for help in the investigation. Passing speech checks with him might net more caps and info.

Exit Covenant and head north-east along the road to find the remains of the missing caravan and recover Deezer's Lemonade but little else. Questioning the inhabitants of Covenant yields little info, they are adamant about having nothing to do with it, they are also oddly nice, almost saccharine. To find more clues, enter the house on the far side of the settlement to discover a holding cell, a bookcase with self-help material and a locked computer. Hack the computer when no one is looking to find out Covenant's real purpose. It is also possible to gather information by speaking to one of the settlers, Talia McGovern, and convincing her that Honest Dan is a synth after passing a few Charisma checks. Alternatively, enter the shop and take the piece of paper from the trash can or pass increasingly harder speech checks with Penny Fitzgerald to reveal the clues. Another alternative is to either pickpocket the key from Jacob Orden or pick the lock to the house directly left of the gate and find the piece of paper near the door. You can also find the location of the Compound at the office terminal. The door and the computer are both Master locks.

Once learning about the existence of the Compound, the Sole Survivor can either talk to Dan or go alone. Trying to exit Covenant, Jacob will be at the gate and will try to convince the Sole Survivor to drop the case, even going as far as offering a bribe.

To find the Compound, head to the fishing spot west of Covenant on the other side of the lake and enter the outflow pipe. If the Sole Survivor told Honest Dan about the Compound, he will be waiting inside and will follow. Continue along the pipe to face armed guards and turrets. By successfully passing a speech check, the Sole Survivor is escorted deep inside the complex to meet Doctor Roslyn Chambers. Otherwise, fighting through the complex becomes necessary. On the way there clues about people being held captive and ongoing experiments/torture can be found.

Once confronted by the Doctor, she explains her intentions of trying to reveal hidden synths who infiltrated the populace by creating and perfecting the SAFE test. A sort of psychological test involving studying reactions of the subject to several situational questions. Improving the test involves establishing a "baseline" and then requires various forms of psychological and physical torture to incite reactions from the subject. She also explains, the reason for capturing Amelia is because they believe she is a synth infiltrator. She may offer to pay the same caps reward offered by Honest Dan.

At this point, The Sole Survivor has two choices:
 * 1) Deciding to side with the Doctor, if accompanied by Honest Dan will cause him to become hostile and killing him will be necessary. Also, inspecting Amelia's body reveals she was indeed a synth. Return to Jacob to win Covenant as a usable settlement.
 * 2) Deciding to side with Honest Dan and free Amelia will turn the Doctor and the rest of the Compound hostile, making it necessary to kill them all. Amelia is in one of the cells up the stairs which can be opened by using the computer terminal or by picking the lock. Speak to Dan to receive a reward. By passing increasingly harder speech checks, more reward can be earned. Choosing this option will also turn the inhabitants of Covenant hostile. Kill them all except Deezer to win it as a usable settlement.

Companion reactions

 * Curie loves "against synth genocide" and she also likes it if you ask her to "spare Amelia" but does not mind if you accept or reject her offer
 * MacCready likes choosing the "spare Amelia" dialogue option, and likes siding with Chambers. He dislikes siding against Chambers.
 * Piper will hate siding with the Doctor.
 * Nick likes "sparing Amelia" and loves the "against synth genocide" options and dislikes if you work with Chambers.
 * Hancock loves siding against Chambers, and loves if Chambers is killed.
 * Deacon will hate siding with the Doctor as well.
 * Danse hates "against synth genocide" as well as the "spare Amelia" option. He dislikes if you reject her offer but also tells you "Wrong move soldier" if you accept her offer.

Behind the scenes

 * The SAFE test is actually the G.O.A.T. from Fallout 3, with all references to Vaults (and the 10th question) removed.
 * The development of the SAFE test to detect and remove synths (machines physically indistinguishable from humans) from the populace and many parts of this mission and dialogues, are a direct reference to the movie Blade Runner (based on the Phillip. K. Dick novel "Do Androids Dream of Electric Sheep?"). The SAFE test is a direct reference to the Voight-Kampff test, which tests the subjects responses to situational questions by measuring preconscious empathetic reflexes and childhood memories, that are usually absent from synthetic people.

Bugs

 * At the caravan, for the optional objective, Deezer's Lemonade might not spawn, if it doesn't it cannot be acquired.
 * A possible fix is by using the console command.
 * Another workaround is to pick up "Deezer's Lemonade" by commanding a companion to check the cooler, trade with your companion and you will find the Lemonade in the AID category.
 * Honest Dan becomes hostile upon entering Compound. Targeting helmet is what causes Dan to become hostile. (For me at least), Happens with another NPC in another quest too. just removing that will suffice.
 * Dr. Chambers' dialogue won't start if Honest Dan is already dead
 * The gate leading into the covenant might already be open even if it's the first time visiting the place, and all the characters act like having already been there and Honest Dan is nowhere to be found, making the quest impossible to complete or even start.
 * One fix is to kill all residents, thus gaining access to the workbench, then resurrecting residents in order to gain settlement if quest can't be started.
 * After finishing the quest Swanson can't be killed unless he is within the borders of the settlement. Since he will rush out to attack the Sole Survivor, it may be necessary to kite him back to the gates.
 * Wearing a Power Armor helmet with the Targeting mod makes Dan hostile when you enter the sewer, and the rest of the NPCs inside the Compound. Need to unequip the helmet before going in. Also, make sure that if you have a companion equipped with Power Armor with the Targeting mod that you have them exit their Power Armor also.
 * After freeing Amelia, the doctor wont turn hostile and will hang around saying "All I did was for the greater good!"
 * Penny Fitzgerald may not talk to the player, only saying "enjoy your stay" when interacted with. Sleeping seems to fix the issue. It's possible there are other simple fixes.
 * If you clear out the compound before finding any clues leading to it or it's existence, and you free Amelia, Honest Dan wont spawn at the Covenant, and the quest will stay bugged and impossible to complete. You may get stuck at "Look for caravan survivors" even after freeing Amelia.
 * Wearing Power Armor with a Tesla torso mod inside of or around the entrance to Covenant will make nearby inhabitants turn hostile. This occurs before or after finishing the quest "Human Error".  Solution is to exit the Power Armor before entering.

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