They say that imitation is the best form of flattery but when it is your 5-year old kid copying the way you discipline him, then it can be unsettling.
For example, he would do something or would ask me for something he's not allowed to have, I would say it with a firm 'No'. Now when I would ask him to do something he doesn't like (drinking his medicine, or being on the computer) he gives me 'No', with that same firm decisive tone I'd use for him....lol

He's a very observant kid and is probably confused why his mum and siblings can do cool stuff.

How do I explain to a 5-year old about how adults can do certain stuff but kids can't?