This study looked at *circular polarisation of radar waves* which may be produced by multiple causes, such as scattered boulders OR buried ice.

The baseline study used *Neutron spectroscopy* to directly detect buried hydrogen.

So we're comparing two (very) different techniques - this wasn't entirely clear in the article Raoul referred to, but is, nonetheless, the case.

One possible interpretation is that in the Lunar polar region the ice resides IN the scattered boulders. This isn't the only one, of course.

Whenever you compare the results of two different techniques and they disagree, they're telling you something important. The trick is to work out WHAT they are telling us. I don't think we're there yet, as understanding goes...