Can you substitute water for milk in a biscuit recipe?!
Answers: Yes, though you won't get the flavour of biscuit that you would get with milk. Plus, you'd need less water, about two thirds the amount.
You might be able to, but the biscuit won't turn out the same. When you use milk, you are not just adding fluid, you are adding a fat to the product which affects the outcome of the finished piece.
Anyone can choose to maintain or disregard recipe ingredients.
Yes, if you're stuck. Won't taste as good, though!
I always make bisquits with water and get no complaints. There is very little difference in flavor. Nobody can tell the difference after they put on the butter or jam or honey or peanut butter.