
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
Out of four outwardly identical parts, one differs in mass from the other three, but it is unknown whether its mass is higher or lower. How can you identify this part using two weighings on a pan balance without weights?

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