Lying to people is wrong.
Denny's rent is due and his roomate has been asking him all week for his portion of the rent money.
Denny wants his roomate to stop asking him for rent money.
Denny wires his roomate his portion of the rent money.
Denny tells his roomate that he has already paid his portion of the rent to their landlord.
The rent is paid on time and Denny's roomate stops asking him about it.
Their landlord never receives the full rent payment and both Denny and his roomate are evicted.