疥疮（scabies）是一种由体外寄生虫引起的、有较高传染性的一种皮肤病。多始发于手指夹缝，症状为皮肤表面出现丘疹，同时伴有晚间尤甚的奇痒。随后逐渐遍及全身，但少见于头部，scabies一词即来源于拉丁语中的“痒”

In debate or rhetoric, a slippery slope (also known as thin edge of the wedge, or the camel's nose) is a classic form of argument, arguably an informal fallacy. A slippery slope argument states that a relatively small first step leads to a chain of related events culminating in some significant effect, much like an object given a small push over the edge of a slope sliding all the way to the bottom.^[1] The strength of such an argument depends on the warrant,^{[disambiguation needed ]} i.e. whether or not one can demonstrate a process which leads to the significant effect. The fallacious sense of "slippery slope" is often used synonymously with continuum fallacy, in that it ignores the possibility of middle ground and assumes a discrete transition from category A to category B. Modern usage avoids the fallacy by acknowledging the possibility of this middle ground.