
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 $$f(x)=\left\{\begin{array}{ll}
\left(\frac{1}{4}\right)^{x}, & x \in(-\infty, 1) ; \\
\log _{\frac{1}{2}} x, & x \in[1,+\infty) .
\end{array}\right.
$$ find the value of \( f(f(-1)) \).

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