When cross-examined about the young earth creationist notion that the universe was 10,000 years old, his reply was "one would have to be crazy to believe that." Could any rational scientist believe that the earth's geology can be explained by a single catastrophe? "No." Could any rational scientist believe that the earth is less than one million years old? "No."

Wickramasinghe's firm understanding of biology was brought forth by asking him to read a passage from Evolution From Space [a book he co-authored with Sir Hoyle] which claimed that insects are in fact smarter than humans but are being very careful to not let on. These statements ended up completely undermining the case of the team [Gish et al] who paid his air fare. Judge Overton expressed confusion as to why the defense recruited Wickramasinghe; he ended up assuming that it must have been because Wickramasinghe was critical of both evolution and the scientific community.