можно искать контестуальный перевод "на пересечении" слов "субъективный", "отрывочный", "неполный", "разрозненный", можно развернуть в "основанный на субъективных впечатлениях"

Statistics on this controversial subject are scarce, and most of the evidence is impressionistic and anecdotal Richard Pipes

impressionism: a vague and subjective response (as to a work of art). Webster's Third New International Dictionary

Her attack is almost always human, rather than critical, highly personal, degenerating occasionally into vague impressionism Mark Scherer

The English annotation is below. (English-Russian). 2003.