Germination is just another word for sprouting and the seeds sprouted when they sent that first tip of the taproot out.2 of the seeds haven't finished their germination yet and have remained in the same state inside the bowl (really, really small taproot) for the last 3 days.
Three days is a long time for the seed to stall that early. My suggestion is to plant them anyway and don't wait longer for something to happen. If something went wrong it probably has already done so. Maybe they are now too wet is my first thought. Putting the seed in some soil might be enough to pull them out of their slump. It is worth a try, up to you.