Exercise-ch2: Difference between revisions

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2-place predicates: '''know''', '''help'''
2-place predicates: '''know''', '''help'''


<quiz points="1/1">
<quiz>
{Click on the items that are well-formed expressions of the semantic representation language.}
{Click on the items that are well-formed expressions of the semantic representation language.
|koef="3"}
+ '''gandalf'''
+ '''gandalf'''
+ '''hobbit'''
+ '''hobbit'''
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{Click on the expressions that are well-formed formulae.}
{Click on the expressions that are well-formed formulae.
|koef="3"}
- '''hobbit'''
- '''hobbit'''
- '''frodo'''
- '''frodo'''

Revision as of 19:53, 15 March 2013

Additional Exercises for Chapter 2: Predicate Logic

Formulae

For the following exercises we use names and properties from the The Lord of the Rings novels.

Names: frodo, sam, gandalf, aragorn
1-place predicates: hobbit, wizard
2-place predicates: know, help

  

1 Click on the items that are well-formed expressions of the semantic representation language.

gandalf
hobbit
frodogandalf
x
know(gandalf)
help(aragorn,frodo)

2 Click on the expressions that are well-formed formulae.

hobbit
frodo
hobbit(aragorn)
x (hobbit(x) ⊃ x = gandalf)
y(hobbit(x) ∨ wizard(gandalf))