== Unit+Unit+Unit 
Type
P
A:Prop. Dec(A) PropA == A 
FalseA:Prop. (A) Prop| Who Cites Three? | |
| Three | Def == Unit+Unit+Unit |
| Thm* Type | |
| decidable | Def Dec(P) == P P |
| Thm* A:Prop. Dec(A) Prop | |
| not | Def A == A False |
| Thm* A:Prop. (A) Prop |
About:
 |  |  |  |  |  |  |  |  |  |  |