
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 that the function $f(x)$ defined on the set of real numbers $R$ satisfies $f(1)=1$, and the derivative of $f(x)$ is ${f}'(x) < 2 (x \in R)$, determine the solution set for the inequality $f(x) < 2x-1$.

A) $(-\infty, 1)$
B) $(1, +\infty)$
C) $(1, 2)$
D) $(-\infty, -1) \cup (1, +\infty)$

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