
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
There are the following four propositions:  
\\(①\\) The converse of the proposition "Congruent triangles have equal areas";  
\\(②\\) If \\(a^{2}+b^{2}=0\\), then \\(a\\) and \\(b\\) are both \\(0\\);  
\\(③\\) The contrapositive of the proposition "If \\(A∩B=B\\), then \\(A⊆B\\)";  
Among these, the true proposition(s) is/are \_\_\_\_\_\_ (fill in the number(s) of the proposition(s) you think are correct).

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