Brett is researching water filters to take on backpacking trips. Experience has

Question

shown him that a backpacking filter should be compact and lightweight and should
filter water quickly. One source he found said the following: "Our 'Nature Series' is
the ideal backcountry filter and is the most economical method for producing pure
water. Our basic model is a five-gallon, stainless-steel tank. Our models might take
longer to filter water than those of our competitors, but the water quality is
phenomenal."

Why might Brett doubt the credibility of this source?
It is unlikely that a filter could process as much as five gallons of water at one time.
The source lists evidence that is too old to be trustworthy anymore.
The explanation of why the filter is good doesn't match what his experience has shown.

Answer 1

Brett might doubt the credibility of this source because the source claims that their backpacking filter is a five-gallon, stainless-steel tank. This is unlikely to be accurate as such a large filter would not be compact or lightweight, which goes against Brett's criteria. Additionally, the source acknowledges that their filter might take longer to filter water than competitors, which contradicts Brett's requirement for a filter that can filter water quickly. Therefore, the explanation provided by the source does not match Brett's experience and expectations, raising doubts about its credibility.