D265 - WGU - CRITICAL THINKING -
REASON AND EVIDENCE QUESTIONS
AND ANSWERS WITH COMPLETE
SOLUTIONS 100% CORRECT RATED A+
2025/2026
Propositions
Definition: A proposition is a declarative sentence that can be either true
or false. It makes a claim about something in the world or about logic, and
this claim can be verified.
Example:
o "The earth orbits the sun" (true proposition)
o "2 + 2 equals 5" (false proposition)
Non-Propositions
Definition: Non-propositions are sentences that do not make claims about
matters of fact or fiction. They cannot be true or false because they don't
assert anything that can be verified. They might be questions, commands, or
exclamations.
Example:
o "What time is it?" (question)
o "Close the door!" (command)
o "Wow, that’s amazing!" (exclamation)
Simple Propositions
, Definition: A simple proposition is a statement that has no internal logical
structure. It is either true or false on its own, and its truth does not depend
on the truth of any component part. It is a straightforward assertion.
Example:
o "Harry Potter wears glasses." (True or false as an independent
statement)
o "The sky is blue." (True or false as an independent statement)
Complex Propositions
Definition: A complex proposition is a statement that has internal logical
structure. It is composed of two or more simple propositions, and its truth
or falsity depends on the truth of its parts.
Example:
o "The sky is blue, but it does not look blue to me right now."
This proposition is a complex one because it contains two parts:
"The sky is blue" and "It does not look blue to me right now,"
connected by the word "but."
o "The cat ate the food, but he did not like it."
This is a complex proposition, as it is made up of two simpler
statements: one about the cat eating the food, and the second
about the cat not liking it.
Words Used to Identify Independent Propositions
Key words used in complex propositions that connect independent
propositions include:
o AND
o OR
o EITHER
o BUT
, o IF (used in conditional statements)
o THEN (used in conditional statements)
Example:
o "The dog is barking and the cat is sleeping."
This is a compound sentence with two independent
propositions: "The dog is barking" and "The cat is sleeping,"
connected by the word "and."
Conclusion Indicators
Conclusion indicators are words or phrases that introduce the conclusion
of an argument. They signal that a conclusion is being drawn based on the
preceding premises.
Examples of conclusion indicators:
o THEREFORE
o SO
o IT FOLLOWS THAT
o HENCE
o THUS
o ENTAILS THAT
o WE MAY CONCLUDE THAT
o IMPLIES THAT
o WHEREFORE
o AS A RESULT
Example:
o "The sky is blue. Therefore, it is a clear day."
Premise Indicators
REASON AND EVIDENCE QUESTIONS
AND ANSWERS WITH COMPLETE
SOLUTIONS 100% CORRECT RATED A+
2025/2026
Propositions
Definition: A proposition is a declarative sentence that can be either true
or false. It makes a claim about something in the world or about logic, and
this claim can be verified.
Example:
o "The earth orbits the sun" (true proposition)
o "2 + 2 equals 5" (false proposition)
Non-Propositions
Definition: Non-propositions are sentences that do not make claims about
matters of fact or fiction. They cannot be true or false because they don't
assert anything that can be verified. They might be questions, commands, or
exclamations.
Example:
o "What time is it?" (question)
o "Close the door!" (command)
o "Wow, that’s amazing!" (exclamation)
Simple Propositions
, Definition: A simple proposition is a statement that has no internal logical
structure. It is either true or false on its own, and its truth does not depend
on the truth of any component part. It is a straightforward assertion.
Example:
o "Harry Potter wears glasses." (True or false as an independent
statement)
o "The sky is blue." (True or false as an independent statement)
Complex Propositions
Definition: A complex proposition is a statement that has internal logical
structure. It is composed of two or more simple propositions, and its truth
or falsity depends on the truth of its parts.
Example:
o "The sky is blue, but it does not look blue to me right now."
This proposition is a complex one because it contains two parts:
"The sky is blue" and "It does not look blue to me right now,"
connected by the word "but."
o "The cat ate the food, but he did not like it."
This is a complex proposition, as it is made up of two simpler
statements: one about the cat eating the food, and the second
about the cat not liking it.
Words Used to Identify Independent Propositions
Key words used in complex propositions that connect independent
propositions include:
o AND
o OR
o EITHER
o BUT
, o IF (used in conditional statements)
o THEN (used in conditional statements)
Example:
o "The dog is barking and the cat is sleeping."
This is a compound sentence with two independent
propositions: "The dog is barking" and "The cat is sleeping,"
connected by the word "and."
Conclusion Indicators
Conclusion indicators are words or phrases that introduce the conclusion
of an argument. They signal that a conclusion is being drawn based on the
preceding premises.
Examples of conclusion indicators:
o THEREFORE
o SO
o IT FOLLOWS THAT
o HENCE
o THUS
o ENTAILS THAT
o WE MAY CONCLUDE THAT
o IMPLIES THAT
o WHEREFORE
o AS A RESULT
Example:
o "The sky is blue. Therefore, it is a clear day."
Premise Indicators
