
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
Given that lines $m$ and $n$ are outside of plane $\alpha$, consider the following three statements:  
① $m \parallel n$; ② $m \parallel \alpha$; ③ $n \parallel \alpha$. Using two of these as conditions and the remaining one as a conclusion, construct three propositions and write down the one you think is correct: ___________. (Use the serial number to represent)

Present the answer in LaTex format: \boxed{Your answer}
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