Instruction: Given a question and its related document, determine if the question is answerable by analyzing the information in the document. Output yes if the document addresses the question, or no otherwise.

Input:
Question: What is the best way to sharpen this knife?
Document: this knife comes razor sharp right out of the box. to test it i filled up two 2 liter soda bottles with water. and sliced the tops off both of them without any water from the bottom half spilling out. pretty amazing! its tough looking and feels great in the hand. it is a very durable knife. my best friend has the same one and has never had to sharpen it in about 6 years of use. the blade is incredibly hard and holds a great edge!
This is one heck of a rugged little 12-inch blade. Love the hammerable tang on the end of the handle. I've used it to do many things and it only shows minor wear. It's not terribly sharp out of the box, so get a whet stone to sharpen it. Excellent and perfect knife!
I just got this knife in the mail. It looks fantastic, has a great feel. It isnt, however, very sharp. It was a little disappointing when I received this and found out that I had to sharpen it. It certainly isnt the biggest set-back, but like I said, Disappointing. Other than that, It came when it said it would through Amazon and was very pleased with what the description said and what I got.
Ka-Bar is the best. I own several and give them as gifts. This is a knife and brand that you can trust your life with.
this is the best knife out there. durable, reliable, worked during long hunting for chopping wood even!!! this is by far my favorite knife!
This knife is one of the best knives I have ever purchased! It comes very sharp and its a really hard blade. But the only downside is that it dulls quickly.
whether your driving tent stakes, or driving though skulls this knife is the best. full steel tang, hard rubber grip. this is one friend that wont ever let you down
It's rugged, sharpens easily with a good stone and hold its edge. The black coating is durable and expertly applied to the blade. Perfect balance and weight. The best fighting knife design that has been around since WWII.
Can't go wrong when purchasing a Ka Bar. This knife is awesome, well built and high quality. I got this for my husband as a gift and he loved it. I also own a Ka Bar myself and by far these are the best knifes out there.
This knife is legit! I was even pleasantly pleased to find it came with a nice edge on it already, though I will hone it a bit more must because I enjoy the process of getting the best edge possible. I even arrived days sooner than was scheduled to come. HAPPY!
Answer: yes