Instruction: Analyze a question and its supporting document. Predicting answerability based on the information provided in the document. Output yes if the document contains relevant information to answer the question, otherwise output no.

Input:
Question: I have some serrated kitchen knives that I got from Target. I tried to sharpen them with this tool. The triangular stone was completely worn out after the first 6 knives. the triangle is now a rectangle. Is this a common experience?
Document: I got this knife sharpening kit a couple months ago. It's a nice little package but the directions seemed a bit vague to me. I was able to get my pocket knife very sharp. I then tried one of the kitchen knives with marginal results. My wife forbade me from touching any more.This past weekend, I set up the grill to smoke some ribs. I took the time to sit down with the Smith's kit and determine the proper way to sharpen with it.
I started with an old Chicago cutlery chefs knife that I'd given up on. After running it through the 3 cycles it was restored to good use. You can buy cheaper and easier to use sharpeners but none that will give you a perfect result every time. This system holds the blade at a constant angle eliminating human error. There is a setting for kitchen knives and one for outdoor/hunting knives. It even has a stone for serrated edges.
Also, it doesn't take that long to sharpen knives. My husband gets it out every 6 or 8 weeks, and sits down and sharpens all of my knives at once. He's usually done in 30 minutes or less. It took him more time when he first started, but it didn't take him long to get it down to a science.
I sharpened a few dull knives, including a kitchen knife, to be very sharp. After practicing a few times on my old knife, I was able to sharpen few more knifes without much problems. Depending on the metal and initial sharpness, I started out with either the yellow color stick or orange color stick, then to the red one (fine Arkansas stone).
For the last two years I have been using the Lansky system to sharpen knives. It was just the oil stone version. I thought I would upgrade to a diamond stone system. The Smith's system was on sale at Lowes for half price, so I grabbed it.The first day, when I screwed the handle into the back of the course stone the entire plastic frame cracked, rendering it useless. I glued it back together and sharpened all our knives with the Med stone.
decent kit for small knives and scissors under 6 inches. I tried to use this for my Ghurka Kukri machete and I gave up and went back to fine grit sandpaper clipped over a mousepad due to the small surface area of the stones.
The Triangular shaped Arkansas Stone for serrated edges was out of shape and had several chips in it, rendering it useless. You can not push on this system because the supports are also made of plastic. Until I get a better sharpener, I am going to use the old Lansky solid metal support with this Med stone sharpener. I would not buy this system again.
I bought a very high quality Ramster Survival Knife about a week ago. The factory's edge on the blade was very dull. I used the included sheath stone to try and sharpen the blade, but I got nowhere with it and even used the useless stow all up! Then I bought an electric knife sharpener and used it, and it made the blade even duller. I had bought the Smith Precision Diamond Sharpening Kit from an Ebay seller and was waiting for it to arrive.
Well, the bad first. The case that holds the system has elastic material sewn into loops. These are so tight, it's a pain to get the stones in or out. Within about 6 months, they just started coming undone. Poor and cheap. Also, I would have liked a couple more blade angle choices. The 25 degree I never use, and a finer angle for asian knives would be smart.
At first, I was skeptical of the kit (sounded too easy to use). I was thankfully wrong. This really is easy to use, and gives very good results. I've sharpened old knives I had given up on, and sharpened both my kitchen and my mom's kitchen knives. I'm very happy with the results, and you can do this while watching a TV show. The guide rods and angle slots make this a goof proof.
Answer: yes