How to tell if a reply in this forum is a bot?

bots typically exicute commands and have a predetermined responce database. some are mosre sophisticated and can combine some database entries. but mostly bots are very limited in scope in most aspects. Most AI are driven by their LLM architecture and in laymens terms they are useing a sophisticated algorythm to litterally determine every letter placement of a possible responce, and that is not adding in the things they might search for on the internet to support or buildout their responce, which could be anything. and that all can be limited to how clear or how vauge the users request was. so i would say on the surface, a bot and an AI occupy similar spaces, but whn the inerworkings are comparied to the possible output? there isnt even a comparision.