EXAMPLE1 命题逻辑 All the following statements are propositions. Washington, D.C. is the capital of the United states of America 2. Toronto is the capital of canada 3.1+1=2 4.2+2=3 Propositions I and 3 are true, whereas 2 and 4 are false 2/24/202111:37PM Deren Chen, ZheJiang UnivL o g i c 命题逻辑 2/24/2021 11:37 PM Deren Chen, ZheJiang Univ. 6 EXAMPLE1 All the following statements are propositions. 1. Washington, D.C., is the capital of the United States of America. 2. Toronto is the capital of Canada. 3. 1+1=2. 4. 2+2=3. Propositions 1 and 3 are true, whereas 2 and 4 are false