I am new to this site (researching buying a home) and found quite an interesting discussion about Ethics.
I've been a fan of Ethics for some time, and tend to be a kind of Kant Universal man myself . . .(apply the ethical choice universal in all situations and is it fair)
So to me the question here is "is lying during a negotiation ethical". At what point does it become unethical? second offers? house defects small? house defects large? property lien/title lien? a home inspector you know will clear the radon test, regardless. . .
There is a certain point I'm sure most (though not all) would draw a line here. And its unlikely that lying on a home offer slides to lying about radon. Yet they are all equal in the fact that they are lies, and that not all lies in all situations would lead to a acceptable result (people can be hurt).
When I purchase or sell a house my expectation would be to hide all information about me, have backup housing so I can move on, etc. If I have an indication of a lie, I would rather move on to the 2nd house (I don't want to compete with other offers, so I will go with the other house without this situation).
Just two cents. . .shout out to the man Immanuel Kant