Category:Wikipedia level-4 vital articles

Deductions

• abstract entity is for example Category:Wikipedia level-4 vital articles ⇐ (Category:Wikipedia level-4 vital articles is a abstract entity), (is a is inverse of is for example)
• Category:Wikipedia level-4 vital articles is a abstract entity ⇐ (Wikimedia category is subclass of abstract entity), (Category:Wikipedia level-4 vital articles is a Wikimedia category)
• entity is for example Category:Wikipedia level-4 vital articles ⇐ (Category:Wikipedia level-4 vital articles is a entity), (is a is inverse of is for example)
• Category:Wikipedia level-4 vital articles is a entity ⇐ (Wikimedia category is subclass of entity), (Category:Wikipedia level-4 vital articles is a Wikimedia category)
• list is for example Category:Wikipedia level-4 vital articles ⇐ (Category:Wikipedia level-4 vital articles is a list), (is a is inverse of is for example)
• Wikimedia category is for example Category:Wikipedia level-4 vital articles ⇐ (Category:Wikipedia level-4 vital articles is a Wikimedia category), (is a is inverse of is for example)
• Category:Wikipedia level-4 vital articles is a list ⇐ (Wikimedia category is subclass of list), (Category:Wikipedia level-4 vital articles is a Wikimedia category)