Does the lime-water test conclusively prove the existence of Carbon Dioxide?

In general laboratory work we use the lime water turns milky as a positive identification test for CO2. If the limewater turns milky we conclude that CO2 has been bubbled through.
Ca(OH)2 (aq) + CO2(g) → CaCO3(s) + H2O(l)

But is there anything else that can turn lime water milky - is this test conclusive for CO2?
How about this :
Ca(OH)2(aq) + SO3(g) → CaSO4(s) + H2O(l).
Passing SO3 gas into limewater will also cause a milky precipitate to form.
But SO3 is a gas rarely found in general laboratories.
So you cannot conclude that the limewater turns milky test is a conclusive identifying test for CO2

What do you mean through "pop scan"? What do you imply by means of "conclusively show carbon dioxide"? It can be rough to reply a query appropriately when we're now not certain what the words you are using mean. Unless you're going into income, law or politics, you relatively wish to make yourself clear to be able to keep up a correspondence rather than confuse and mislead.

yes, it can be tested for existence of CO2!~ why no??~