
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
Following the strong earthquake in Wenchuan, Sichuan, on May 12, 2008, our city immediately assembled a team of core doctors to rush to the disaster area for earthquake relief. A certain hospital needed to randomly select 2 out of 4 core surgeons, including Dr. Zhang, to join the earthquake relief medical team. What is the probability that Dr. Zhang is selected?

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