Everyone knows that when a girl laughs at your jokes, even the crappy ones, it is an ioi.
Also, sending her too many IOIs is a dlv.0
So here is the conundrum: If she tells a joke or says something that is genuinely funny, but you are still working on getting her attraction, is it a DLV to laugh heartily and give her the premature IOI? Or is it considered a dhv to recognize and appreciate quality humor when you see it?
Obviously, if she is already attracted to you, go ahead and enjoy your conversation and build up comfort.
PS: one last possibility I just came up with: Is it an IOI from her to make a funny comment or joke, as if she were trying to get the laugh out of you? In this case, would laughing be a counterproductive IOI since you have just swapped 1-for-1 right after another? (MM says not to immediately give her an IOI after she gives you one, since she'll see you're only giving to her in response to her giving to you.)