When it came to glass blowing, Hanson had to admit they were experts; it should have come as no surprise, after the elaborate alchemical apparatus he'd seen.
Hanson noticed that their glass blowing was of poor standards.
mnli hypothesis: Hanson noticed that their glass blowing was of poor standards. premise: When it came to glass blowing, Hanson had to admit they were experts; it should have come as no surprise, after the elaborate alchemical apparatus he'd seen.