"Rule out" is a versatile phrasal verb commonly used in both informal and formal contexts, although it tends to appear more frequently in formal or professional settings such as discussions of planning, problem-solving, or analysis. In medical, scientific, or technical contexts, "rule out" is often employed to indicate the elimination of possibilities or hypotheses, such as in a diagnostic process where certain conditions are excluded based on evidence. Similarly, in everyday informal conversation, it might be used when someone wants to dismiss an option or possibility, as in planning logistics or making decisions. The usage of "rule out" often involves a reasoning process, where evidence or constraints lead to the exclusion of specific options or scenarios. This phrasal verb conveys a sense of thoroughness and careful consideration, making it particularly effective in contexts that require logical deliberation.
B1
Intermediate
1. To eliminate or exclude something as a possibility or option.
The doctor ruled out a serious illness after reviewing the test results.
We need to rule out these options before making a final decision.
2. To declare that something is not acceptable or possible.
The manager ruled out the possibility of working remotely.
Safety concerns ruled out the use of this equipment.
