The phrase implies confidence in one's own understanding or expertise on a topic.

Self-assurance

Used to emphasize that the speaker has a depth of knowledge, often from experience or study.

Expert Opinion

Asserts credibility in a conversation and may discourage others from questioning the speaker.

Used to cast doubt on someone's understanding or to challenge their statements.

May invite the speaker to provide more information or evidence to validate their claim.

Signals the listener's doubt about the speaker's capacity to discuss the topic knowledgeably.