> Mischkowski suspects that this would also be more difficult to summon after taking the drug.

Why should I trust someone who doesn’t test properly but just suspects?

What? Read the article fully; it has to do with "negative empathy" different from "positive empathy".

Dominik Mischkowski is a Pain Researcher at Ohio University who has been studying this for a while. The word "suspects" here is statistical research-speak meaning there is a correlation (w.r.t. positive empathy) but more studies are warranted (w.r.t. negative empathy). That is all.