Critical Thinking is a collaborative, educational project in which we share information and learn from each other. For a while Daily Pickings would thank individuals who contributed material by accrediting them with a personal "Hat Tip" (H/T). However, keeping track of who's sent what became harder work we used H/T to indicate the item was contributed by a "Critical Thinker". What became obvious is that most everything is contributed by critical thinkers and it is pointless to discriminate. So we've now abandoned the use of hat tips (H/T).