Hello, Jeff, To me, if someone "stipulates" something, s/he gives you an order, tells you what you have to do. On the other hand "tacit" means "without speaking", "without words", "implied". With "tacit", you already know what you have to do, you don't need anybody to tell you.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.