An unfamiliar expression is not automatically a language error. Different regions, registers and personal styles can provide several valid ways to communicate a meaning. When feedback conflicts with something you learned, identify the context and evidence before replacing the form. The aim is accurate judgment: knowing when a repair is necessary, when a choice changes meaning and when another speaker simply prefers a different option.
Establish what the expression is meant to do
Keep the full sentence, situation and intended audience. A form that is ordinary in casual speech may be unsuitable in a formal document without being universally wrong. Likewise, two apparently similar phrases may differ in certainty or relationship. Context gives the question boundaries, preventing a narrow recommendation from being expanded into a claim about the whole language.
Ask the person giving feedback what kind of issue they see. Does the sentence change the intended meaning, violate a grammatical pattern, sound unusual in their variety or merely differ from their preferred wording? A clear explanation is more useful than a correction alone. Competent speakers may not always use grammatical terminology, so an example or contrast can establish the point more effectively.
Check reliable sources appropriate to the question. A learner dictionary may clarify a pattern, a style guide address formal writing and trustworthy examples reveal usage in a particular setting. Frequency alone does not prove appropriateness, but one person's unfamiliarity does not establish impossibility either. Look for evidence that matches the register and meaning rather than collecting random examples with the same words.
Keep alternatives and corrections distinct in your notes
Record a necessary correction as a repair with its reason. Record another valid version as an alternative, including any useful difference in tone or context. Avoid replacing every old example whenever you encounter a new preference. Constant unexamined revision can make the language seem unstable and obscure distinctions you had already learned accurately.
If an expression is valid but not the best choice for your current goal, choose a more suitable one deliberately. You may prefer a widely understood form for a practical interaction or a particular variety for a course. That selection does not require declaring the other version wrong. Learning can include both recognition of variation and a narrower set of forms you currently produce.
Use the selected wording in a changed task and seek focused feedback when uncertainty remains. Ask whether the revised version fits this audience and purpose. Keep unresolved questions marked rather than forcing a universal rule from incomplete evidence. Some matters of naturalness require more context and experience than one short exchange can supply.
The useful result is a calibrated decision: repair this feature, prefer this option here or retain both as valid alternatives with different uses. Distinguishing those outcomes makes feedback less arbitrary and future practice more accurate, allowing unfamiliar language to become a source of informed curiosity instead of an automatic reason to erase what you previously learned.