
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
The education department of Tongxi University wishes to organize an environmental knowledge quiz themed "I am eco-friendly, I take action." From four students, A, B, C, and D, within a certain campus, two will be randomly chosen to participate in the competition. The probability that at least one of A or B is selected is ______.

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