Character mistake: The fetus' blood type was AB and the mother had a known type of A. So Dr. Huang said the Father had to be type B which is not completely true. The father could also be type AB as long as he had a single chromosomal copy of the B allele, which any doctor would know. During meiosis only half your genetic DNA is passed on to the offspring.
Resilience - S4-E10
Factual error: In the intro scene, a girl attempts to jump under a train at what should be the West 4th Street station. However, the sign "Church Av" is visible behind the actors, revealing that this scene was actually filmed at the Church Av station in Brooklyn. This location is a common spot for filming subway scenes. Moreover, the train that arrives on the platform in this scene is an "N" train, even though the N train does not actually travel to either West 4th Street or Church Av. (00:00:21)
Visible crew/equipment: After the Undercover Stabler hangs up the phone and explains the scheme to Cabot and Cragen, he passes in front of a mirror to sit. In the reflection of the mirror you can see a microphone hanging overhead. (00:25:40)
Visible crew/equipment: Tutuola is speaking with Violet Tremain, the mother of Cherish Doe in a room at the station. As she stands up, a microphone pole is visible in the mirror behind her. (00:09:55)
Visible crew/equipment: When Benson and Tutuola make a visit to M.E. Warner, the reflection in the glass shows a crew member holding a microphone. (00:20:10)
Character mistake: When Munch and Finn visit victim's apartment, Munch states that the glass in the broken window is tempered, The glass is not tempered but more likely laminated wire glass; due to he fact that the glass is still intact and the child had to use wire cutters to get out.
Other mistake: When Warner sprays the victim's neck during the autopsy to check for copper, the victim has a pulse.
Answer: It was a misconception about Jehovah's Witnesses beliefs. Only blood transfusions are discouraged in their beliefs, medically.