Can fluoride be filtered out using pur?

No. The manufacturer's web site at http://www.Purwater.Com/pur-products/learn-more/pitcher-water-filter-replacement.Html claims that "...It still leaves behind beneficial fluoride".
NO. Fluoride is very difficult to remove from water. Reverse osmosis, distillation or activated alumina filters are required- see http://chemistry.About.Com/od/chemistryhowtoguide/a/removefluoride.Htm this is unfortunate, as Fluoride is more toxic than lead & is unwisely added to over 70% of water supplies in the us. See http://naturaldentistry.Us/1378/the-dangers-of-fluoride/.
I believe so. I believe that the activated charcoal in the pur water filters removes Fluoride as well as chloride ions. Check with the manufacturer to be sure.