Mr W is very, very perceptive - and combined with his intelligence and stubborness, we have run into a brick wall.
This is a tough one. For us it only got easier when ds got older.
Here's another one from the sears book (or maybe it was the the website) cold is supposed to numb the taste buds so medicine doesn't taste as bad. Have child suck on a popcycle or ice cube right before and right after the medicine. This still requires some cooperation on the part of the child so may only consistently help once Mr. W is older.
Or could work now as a one time distraction. Good luck!