In the following group discussion, which technique is evgeny using to better
evaluate an argument?
evgeny:
does this author even have the authority to comment
knowledgably on the topic?
hailie:
well, he is a doctor so it seems that, obviously, he knows
what he's talking about.
evgeny:
right, but does he have children of his own? how can he
suggest parents make this difficult medical decision if he
doesn't know what it's like to have a sick child?