What is it called when you define something by what it is not

Thể loại

• Live action
• Sci
• Tragedy
• Comic
• Slice of Life
• Seinen
• Ecchi
• Sports
• Harem
• Mature
• Psychological
• fi
• Webtoon
• Soft Yuri
• Mecha
• Truyện scan
• Doujinshi
• Trinh Thám
• Gender Bender
• One shot
• Cooking
• Shoujo Ai
• Anime
• Josei
• Cổ Đại
• School Life
• Thiếu Nhi
• Adventure
• Action
• Truyện Màu
• Shoujo
• Romance
• Ngôn Tình
• Mystery
• Manhua
• Historical
• Fantasy
• Martial Arts
• Shounen
• Soft Yaoi
• Shounen Ai
• Manga
• Horror
• Smut
• Supernatural
• Chuyển Sinh
• Drama
• Xuyên Không
• Đam Mỹ
• Comedy