If you've gained new insights on one of your assumptions that enabled you to validate or invalidate it, you of course want to note this down somewhere, so you can keep track of what assumptions around your business model are true or not.
Luckily you can easily do so in Dispatch! Just click on an assumption in your assumption grid, and select either Validated or Invalidated underneath "Status":
Opening an assumption again
Accidentally (in)validated your assumption, or found out your findings weren't conclusive after all? No problem! You can easily open an (in)validated assumption again by opening it, and clicking on "Re-open assumption" in the top right corner: