Those loooooooong C & Ps :_| :_|

Like I indicated before, they're obsessing about water. Had there been much water on the Planet, by now, they'd have found irrefutable evidence of sedimentary rocks to go along with other indications.

Flowing dust/sand and rounded pieces of rocks (Pebbles) only shows that the stuff has moved downwards = down a mountain/hill/slope.

Had there been a lot of water, there would be large rounded stones such as these :-

With water worn stones, you find them ranging from rounded boulders, down through cobbles between 2 and 4 inches in size to pebbles and not only that, there would be a heck of a lot of 'em.

They need to present a proper argument for any large amount of water having been on Mars instead of clutching at every minor straw which might indicate what they WANT to find.