They don't say it's a flowing feature - they're saying that this is a pool - and even describe it as on a crater floor. The first is impossible on the slope here - the second is an outright lie.

Then - they also say that it is absolutely flat - but without features to derive topography - self contradictory. Myself and a few others had to double check this wasn't an april fool it's so full of holes.

Some fluids might exist transiently on the surface - but this isn't it and they just after tabloid hype with the nonsense in their 'paper'.

Doug