They wrote a memo saying they could.
https://www.documentcloud.org/documents/26499371-dhs-ice-mem...
The word for it is cherry-picking and it is better classified as a fallacy.
Most people… eh. I don't know about the rest of the world, and my experience was in the 90s, but for me GCSE triple science was a list of facts to regurgitate in exams, and although we did also have practical sessions those weren't scored by how well we did Popperian falsification (a thing I didn't even learn about it until my entirely optional chosen-for-fun A-level in Philosophy; I don't know if A-level sciences teaches that).
The people who replied to you provided the source: upvoted them.