What is a boring or unoriginal remark referred to as?

A boring or unoriginal remark is referred to as a "platitude." This term is often used to describe statements that are overly simplistic or clichéd, lacking depth or originality. Platitudes frequently involve common phrases or ideas that have been repeated so many times that they lose their significance and impact. For example, sayings like "Everything happens for a reason" or "Time heals all wounds" can be seen as platitudes, as they are often used without genuine engagement in the topic at hand.

The other terms do not fit this definition. A sanction generally refers to a penalty or punishment for a wrongdoing, a soliloquy is a dramatic speech delivered by a character alone on stage which reveals their thoughts, and rhetoric involves the art of effective or persuasive speaking or writing. None of these terms convey the idea of being unoriginal or boring in the way that "platitude" does.