Write a 40-card flashcard deck in a {{tone}} tone for {{target_audience}} to achieve {{goal}} on {{topic}}. Include 15 basic, 15 intermediate, and 10 advanced cards. For each card provide: front, back, and category tag. Include study instructions and a tab-separated import section. Keep under 1500 words. If a fact cannot be confirmed, skip that card. Paste any relevant background information after these instructions before running.