Yes,
alle groups are hidden by default, so there is no need for a hide option. Let’s say you want to hide a group if x=1, then you can simply write it as:
if [x] not equals "1" then show [group]
I have a similar problem.
I would like the “taxi options” to be visible at start of the form.
Even if the first answer is not selected.
I have create this condition but it’s work correctly only if Suggest Accomodation is checked.

https://www.dropbox.com/s/v9dxuecpewcd7jz/Schermata1.png?dl=0
Taxi option is not visible when SUGGESTED ACCOMMODATION has not been selected

https://www.dropbox.com/s/yxu2rkj742604up/Schermata2.png?dl=0
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This reply was modified 8 years, 10 months ago by
reddevlab.
Create the radio button (example “first”) just to show the taxi group.
With CSS (:nth-child(1) {display:none}) hide the first radio button.
It’s a workaround!