It seems like mumbling is an easy way for you to avoid accountability for your words, but that's not an effective way to communicate with others. Not only does mumbling make it difficult for the other person to understand you, but it also implies that you don't take responsibility for the things you say. You're wrong in thinking that this is an adequate way to communicate.

Mumbling can lead to confusion and frustration, both for you and the person you are talking to. It can create a lack of trust in a relationship, as the other person may not be sure if they can rely on what you say. Furthermore, it can breed doubt and suspicion, as the other person may not be sure if you are telling the truth or just trying to get out of a difficult situation.

In addition, retracting your words after you've said them can also be seen as an act of dishonesty. Retracting your words implies that you don't stand by what you say, and it can make the other person feel like they can't trust you. It's important to be honest and accountable for your words, and retracting them after you've said them is not a good way to do that.

In conclusion, mumbling and retracting your words are not effective communication strategies. Not only can it lead to confusion and frustration, but it can also lead to a lack of trust and dishonesty. If you want to communicate effectively, it's important to be clear and honest about what you're saying.