
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
A unit cube is sliced along one of its body diagonals to create two identical tetrahedra and the remaining middle portion as a truncated rectangular pyramid. One of these cuts occurs from vertex $A$ to the midpoint of the opposite face. Calculate the volume of the truncated pyramid that remains in the center.

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