Answer: that parents would rather sell their children than be responsible for them.
Explanation:
A False Premise refers to a situation where an argument is based on a wrong assumption. Normally this would mean that the argument would be wrong as well but sometimes this is not the case.
In this essay, the author, Jonathan Swift relied on the false premise that parents would rather sell their children than be responsible for them. In other words he was saying that parents would sell their children to the higher classes to to survive.
If you are committed to doing something, and especially to create a positive outcome for difference than you can do it. As long as your committed, anything is possible. :)