
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 the universal set $U = \{y \mid y = \log_2 x, x \in \{\frac{1}{2}, 1, 2, 16\}\}$ and sets $A = \{-1, 1\}$, $B = \{1, 4\}$, find the set $A \cap (C_U B)$.

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