The following five sentences, labeled 1 to 5, relate to a single topic. Four of these sentences can be arranged to form a logical paragraph. Identify the sentence that does not fit with the others and enter its number as your answer.

1. Inflation targeting compels central banks to articulate a specific, publicly declared numerical objective for price stability, thereby establishing a transparent and verifiable benchmark for the conduct of monetary policy.
2. The fundamental premise underpinning this framework is to meticulously anchor private sector inflation expectations, which, in turn, mitigates economic uncertainties and fosters a more predictable macroeconomic environment for households and firms.
3. Through such a credible commitment to a defined target, monetary authorities endeavor to lessen the real economic costs associated with disinflationary measures and enhance the potency of their conventional policy instruments in steering the economy.
4. While predominantly aimed at achieving price stability, strict inflation targeting frameworks have sometimes been critiqued for potentially overlooking the accumulation of financial imbalances, thereby posing risks to broader systemic stability.
5. A key component contributing to the sustained efficacy of this strategy often involves robust forward guidance, where central banks communicate their prospective policy stance to further cement market expectations and reinforce the target's long-term credibility.