Questions: Being a month is a for being January.
necessary
sufficient
Transcript text: Being a month is a $\qquad$ for being January.
necessary
sufficient
Solution
Solution Steps
To determine if being a month is necessary or sufficient for being January, we need to understand the logical relationship between the two statements. Specifically, we need to check if being January implies being a month and if being a month implies being January.
Step 1: Understanding the Relationship
To analyze the relationship between being a month and being January, we denote:
Let \( A \) represent "being January."
Let \( B \) represent "being a month."
We need to evaluate the implications:
\( A \implies B \) (If it is January, then it is a month.)
\( B \implies A \) (If it is a month, then it is January.)
Step 2: Evaluating the Implications
From our analysis:
The statement \( A \implies B \) is true because January is indeed a month.
The statement \( B \implies A \) is false because there are other months besides January.
Step 3: Conclusion on Necessity and Sufficiency
Since \( A \implies B \) is true and \( B \implies A \) is false, we conclude that being a month is necessary for being January, but not sufficient. Thus, we can express this as: