
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
Phenolphthalein solution is a commonly used acid-base indicator that does not change color in acidic, neutral, or alkaline solutions in the given order. Determine the probability of turning red after dropping phenolphthalein reagent into any of the 5 bottles of colorless liquids.

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