<s>
Defeasible	B-Application
logic	I-Application
is	O
a	O
non-monotonic	O
logic	O
proposed	O
by	O
Donald	O
Nute	O
to	O
formalize	O
defeasible	O
reasoning	O
.	O
</s>
<s>
In	O
defeasible	B-Application
logic	I-Application
,	O
there	O
are	O
three	O
different	O
types	O
of	O
propositions	O
:	O
</s>
