It’s natural to ask about being knocked senseless. It would even be good sense, if only that weren’t an impossibly complicated logical problem. About the only resolution is to list important senses ahead of time so if you lose them you will be able to tell, and feel the worse for it.
The sense of taste. Without this, there’s really no way to know whether you like what you’re eating or whether you merely think you do. To test whether you have this you’ll need some calibration. With a trusted friend, or an enemy whose respect for the integrity of knowledge overcomes your differences, swap tongues and test some agreed-upon meal. Take notes! You’ll want to compare them. Under no circumstances start arguing about whether the color that you perceive as blue is the same thing that your friend or enemy perceives as blue. Starting on this path will result in unpleasant questions about whether chocolate tastes like chocolate or whether you merely think there is a taste to chocolate. Those lacking friends or trustworthy enemies can borrow a tongue from the library. It is normally kept in the multi-media section so that patrons will know all of their audiobooks and DVDs have been licked by a qualified tongue.
The sense of scale. There are so many needs for this, and not just if you want to tell whether that’s a naked cobra in front of you. It’s not. It’s a garter snake. You live in Troy, New York, for crying out loud. Be sensible. It’s not like … wait, garter snakes are venomous? Who’s responsible for that? Excuse me, can we talk with the person in charge of reptiles so we can sort out who thought we needed venomous garter snakes? OK, wait, Wikipedia says they don’t produce a lot of venom and they don’t have any good way of delivering it? The heck, garter snakes? If you’re going to be venomous then do it right, and if you’re not going to be venomous don’t go getting us all riled up like that. You’re supposed to be North America’s cute little starter snake so we can look at you and feel a little thrill and then laugh at ourselves for getting scared. What are you doing getting all complicated like that?
The sense of touch. This is an important sense in order that people learn whether their legs are being attacked by a cat hiding underneath the bed. Without this sense who could say whether they were even on a bed, apart from looking at the thing they’re in and reviewing the checklist of important qualities of bed-ness to see if enough of them are satisfied? Yes, exactly. And you thought I was just going on a bunch of nonsense today.
The sense of balance. Without this it’s almost impossible to do a professional job arranging the graphic elements for a newspaper page. While one can carry on, the best one can hope for is pages made competently, without the sense of joy or wonder that truly engages readers. Without attractively-arranged pictures, headlines, and text blocks, people are forced to leave behind the printed newspaper and take up positions in web page design and glaring at the neighbor that’s parked on the wrong side of the road and building dense hedge mazes around what was until hours ago the municipal parking lot.
The sense of scale. Among the other many needs of this you need something to help you avoid stepping onto one and getting the unpleasant news about your weight. You have one. That’s a hard thing to hear about this early in the century, and it won’t be any easier later in the century either.
The sense of smell. Without the ability to notice a curious odor there’s no way to tell that your car is on fire except by the honking and frantic waving of people in the car next to you. This limits your driving to two-lane roads with enough traffic, which can cause you to be late for whatever you needed to do.
The sense of scale. Without the ability to tell which things are nearby and small and which are far away yet large you might accidentally take too large a step for the situation and turn out to be ten floors up on top of the building. This may inconvenience the person you were walking with. It’s different if you were trying to lose the person after finding out what they think food tastes like. You just have to know the context for what you think you’re doing.
The sense of sponge. Without this sense you could be surprised by something moist yet compressible. You can’t go around spritzing objects to then test whether they become more compressible, not without having to answer questions from the unexpectedly damp.
Should any senses be missing you should replace them from the store. Try aisle four, by the dollar toys.