My wife and I said “maybe” when we meant “no” but wanted to avoid an argument at that time. They knew what maybe means.
If a diplomat says "yes," he means "maybe." If a diplomat says "maybe," he means "no." If a diplomat says "no," he's no diplomat.
If a lady says "no," she means "maybe." If a lady says "maybe," she means "yes." If a lady says "yes," she's no lady.