Don’t know if there’s assumptions/requirements behind it but intuitively?
Set of all false propositions would necessarily be bigger and by far.
Consider, “What might have been but never was?”
Yes, you can have a set where “What might have been but never was.” and they are all true in that they might have been but never were.
Yet when evaluated as they stand they’d each be false.
Now recombine in different ways.
That said, a simple word change can render all false statements true and another can render all true statements false.
So, I dunno. What’s pi? 3.14? No. 3.141? No. 3.142? Closer but not. 3.1415? No. 3.146? Closer but no.