Coupled / Not Coupled

In the Relevant field of Template properties, one can use coupled(CurrentClient) to indicate that we want things like the joint letter to print when returns are coupled. What is the opposite of coupled(CurrentClient), that is what do we put in the Relevant field if we want the item available only when the taxpayer is not coupled?

Would it be coupled(CurrentClient) = false or !coupled(CurrentClient) or?

Also, is there a way to use this in the actual template as a condition? I tried {{CurrentClient.Coupled}} but got no result.

Okay, I think I found the answer to the first question. It looks like the syntax is:

not(coupled(CurrentClient))

But still wondering if there is a way to use that in the body.

Try a condition like the following:

{{# not(coupled(CurrentClient))}} Add your text here. {{/end}}