What makes reading comprehension such a complex thing is that understanding what you're reading is a completely personal and almost totally internal task. (edudemic.com)
No judge would allow lawyers to waste the court's time pleading such a complex thing as fair use in a case like that. (law.stackexchange.com)
«And I found that, while my Ph.D. was absolutely brilliant in giving me very... narrow, deep knowledge, I didn't have the breadth or the communication skills to be able to explain such complex things in a way that would be useful for my family.» (sciencemag.org)