
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
Among the following five propositions:

① Any two variables have a correlation.  
② The circumference of a circle has a correlation with the radius of that circle.  

③ The demand for a product has a non-deterministic relationship with the price of that product.  

④ The regression line equation obtained from a scatter plot may be meaningless.  

⑤ The correlation between two variables can be studied as a deterministic problem by using the regression line to transform the non-deterministic problem.

The correct propositions are numbered \_\_\_\_\_\_\_\_\_\_\_\_.

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