
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
Proposition p: "x^2=1" is a sufficient but not necessary condition for "x=-1".  
Proposition q: Given vectors $$\overrightarrow {a}=(1,1,0), \overrightarrow {b}=(-1,0,2)$$, the necessary and sufficient condition for $$k \overrightarrow {a}+ \overrightarrow {b}$$ to be perpendicular to $$2 \overrightarrow {a}- \overrightarrow {b}$$ is $$k= \frac {7}{5}$$. Then, among the following conclusions:  
① "p or q" is false; ② "p and q" is true; ③ p is true and q is false; ④ p is false and q is true.  
The correct conclusion number(s) is/are __________ (write down all the correct conclusions).

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