Appraisal
Expert Opinion, Judgement
noun, verbal noun, の adjective
When someone determines something, it's probably okay. But, when the model determiner determines something, that is the best determination ever. That is the appraisal of someone with an expert opinion.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
お前が赤ん坊の本当の父親かどうかを調べるために、DNA鑑定を受けた方がいいんじゃないか。
You should take a DNA test to find out if you are his real father.