It is true that smoking is bad. So is it that drinking is bad.
Is this construction possible?
closed as unclear what you're asking by Chenmunka, snailboat, user4215, jimsug, РСТȢѸФХѾЦЧШЩЪЫЬѢѤЮѦѪѨѬѠѺѮѰѲѴ May 23 at 7:20
Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question.If this question can be reworded to fit the rules in the help center, please edit the question.
So is/does X, meaning X is/does the same, can only be used when X is the subject of a proposition.
But the construction It is true that [Y] represents
It is not a "real" subject but a "dummy" subject, only put in so [Y] can be postponed until after true. Consequently it cannot serve as the subject of so is/does X. You have to say: