でしょう

でしょう is used when you guess or infer something based on evidence, but you want to be polite or tentative. It softens statements and invites agreement. It’s common in everyday conversation, especially when you’re not completely sure or when you want to sound considerate. It’s more polite than だろう and often used in place of a question tag to check someone’s opinion. でしょうか is the formal question form, used when asking someone else for confirmation in a more polite way.