Instruction: Evaluate the answerability of a question by analyzing the related document, outputting yes if the document contains information addressing the question, and no otherwise.

Input:
Question: Does anybody honestly know how accurate the pH readings are? If so, HOW do you know?
Document: I don't know how accurate the ph tester is, but it seems pretty close. I was surprised how well it works for the price. Eliminates guess work when it's time to water.
Incredible price for this product with so many functions. I double checked pH reading against a pH strip paper and came out accurate (both readings agreed) for acidic soil reading (4.5 -5) on coconut coir. So, I trust the reading on this device. It's invaluable for a gardener.
This unit woriks just great, it is so easy to test the soil in pots and in the ground. Readings are clear and extreamly helpful when one does not know how well the soil is doing.
Save your money, buy a nice digital one. They worked well ( not real accurate, but got me close) then one when out of adjustment and was giving wrong readings
At first I didn't notice the switch so I thought it was broke, Having remembered the terrible reviews. Not sure if the PH is working but the moisture and light readings are accurate. I would buy this again for $2-3
I ordered 2 of these units, wondering how accurate a $5.00 PH meter can. The light and moisture readings were relatively the same, but the PH meter readings varied by roughly .5. My Miracle Grow soil tested at 7.0 with unit A, and 7.5 with unit B. Both items were shipped promptly from the US (default vendor was from China, i changed vendors for the same price).
Gives me moisture and ph readings from one meter. The price was really low for the performance of this meter compared to other meters
I added pH down to my tap water to a pH of 6.8, and putting the meter in the water got a reading just below 7.For moister, it gives you gross readings, dry, moist, very moist.
Moisture and light readings are whatever, I'm not too worried about those, got this as a cheap ph reader I could insert directly into the soil. Everything reads slightly basic and usually just hovers between 7 and 8 (8 is maximum). I put it in distilled water, it read somewhere around 7, I put in in distilled white vinegar and it read between 4 and 5, but it took a little time to get there, not immediate at all.
The device is definitely a bit flimsy feeling, but it works just fine for me. I use it to check the moisture of my plants indoors and moisture and ph outdoors. Do I think it is 100% accurate? Probably not, but it gives me a good idea to go from. For the price I paid, it is a great product.
Answer: yes