I came up with a creative solution for validating that users at least check one checkbox on the form.
I created my Booleans and added to the window.
Added a new attribute named "You Must Select at Least one checkbox" and set it to hidden on the window.
I then created a dynamic window calculation that evaluates to see if at least one Boolean is checked. It nothing is checked then I leave the hidden attribute hidden but I set it to mandatory. If at least one is checked I make that field not mandatory.
The error that appears if no Boolean is checked is:
You need to fill in the following mandatory fields: "You Must Select at Least one checkbox"