
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
Consider the following assertions:
1. The function $f(x)= \frac {|x|}{x}$ is identical to $f(x)= \begin{cases} 1, & \text{if } x\geq 0 \\ -1, & \text{if } x<0 \end{cases}$.
2. The function $y=2x-1$ is the same as the function $y=2t-1$.
3. The graph of $y=f(x)$ intersects the line $x=2$ at most at one point.
4. The equation $y=1$ does not represent a function.

Identify the correct assertion(s).

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