They are commonly used synonymously. English as she is spoke is not a logical language. https://www.merriam-webster.com/grammar/could-couldnt-care-less https:/

They are commonly used synonymously. English as she is spoke is not a logical language. https://www.merriam-webster.com/grammar/could-couldnt-care-less https://www.merriam-webster.com/grammar/could-couldnt-care-l... https://dictionary.cambridge.org/dictionary/english/could-care-less https://dictionary.cambridge.org/dictionary/english/could-ca...