Participants are not able to edit the content of thoughts they've shared. Once a thought is shared it is instantly available to other participants for rating. If a thought has been rated by other participants, any edits made to that thought could impact the accuracy of those ratings. Those who rated the thought previously might react differently to the new content.
Participants do have the ability to delete thoughts they've shared by going back to the Share step and clicking the three dots in the upper right-hand corner of the thought bubble and choosing the "Delete" option. However, we encourage participants to leave these thoughts in the exchange - even if you don't agree with an idea you've shared anymore, other participants might still think it is important. Leaving it in the conversation could add some diversity to the ideas that the leaders of the exchange see or spark new ways of thinking in other participants.