“Some hypotheses for why PTSD only tortures some trauma victims blame it on unhappily coded proteins, or a misbehaving amygdala. Family history, or maybe previous trauma.”

This quote is an evaluation claim. “Some hypotheses” would possibly refer to expert evaluations on PTSD. There is no definitive evidence in the claim but it infers that the topic has been researched and data was drawn from the studies. Because of this, the author is stating that based on the evaluation of research done, it is presumed that the causes for PTSD are what was listed.

 “If sympathy for Caleb is a little lacking, you can imagine what little understanding exists for Brannan.”

This is an ethical or moral claim. In the quote, it is inferring that Brennan has received little to no sympathy compared the Caleb. This claim is comparing the amount of sympathy of each individual on the basis of how others would reflect on their situations. In doing so, it is using emotions and ethics of others to support in the claim

“It wasn’t an official diagnosis until 1980, when Post Traumatic Stress Disorder made its debut in psychiatry’s Diagnostic and Statistical Manual of Mental Disorders”

This quote is a factual claim. It provides a timeline and specific place in which the term and definition of PTSD was officially diagnosed. Though throughout the article, the terms for what PTSD was known as has changed, the signs and definitions were always the same. Yet the official diagnosis and term were not introduced until 1980.