
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 following four propositions about distinct lines $m$, $l$, $n$ and planes $α$, $β$:

$①$ If $m⊂α$, $l∩α=A$, and point $A∉m$, then $l$ and $m$ are not coplanar;

$②$ If $m$ and $l$ are skew lines, $l//α$, $m//α$, and $n⊥l$, $n⊥m$, then $n⊥α$;

$③$ If $l//α$, $m//β$, $α//β$, then $l//m$;

$④$ If $l⊂α$, $m⊂α$, $l∩m=A$, $l//β$, $m//β$, then $α//β$.

Identify the true proposition(s) by filling in the sequence number(s).

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