
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
Seven squares of a chessboard $(8 \times 8)$ are on fire. At each step, a square catches fire if at least two of its neighboring squares (sharing a side, not just a corner) are on fire. Is it possible for the fire to spread everywhere? If not, what is the minimum number of squares that must initially be on fire for the fire to be able to spread everywhere?

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