What s wrong with so called default logic?

• Grant number: 95/02984-8
• Support Opportunities: Research Grants - Meeting - Brazil
• Start date: July 26, 1995
• End date: July 28, 1995
• Field of knowledge: Humanities - Philosophy - Logic
• Principal Investigator: Walter Alexandre Carnielli
• Grantee: Walter Alexandre Carnielli
• Host Institution: Instituto de Filosofia e Ciências Humanas (IFCH). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
• Associated research grant: 93/00925-9 - Mathematical and computational aspects of translations between logics, AP.TEM