Another officer, a veteran, sees that you have retrieved dental floss and asks what you intend to do with it. after you explain, he warns that it is not a good idea. sometimes a seemingly innocent request to break the rules turns out to just be the start, and once you have broken the rules, the inmate has something to hold over you. this can lead to more and more problematic requests and demands. this process is known as:

This process is known as "slippery slope".

The slippery slope is a typical intelligent false notion (and a variation on the contention from unfavorable outcomes) that requests a restriction or abridgement on something in light of a falling arrangement of undesired outcomes. While the slippery slope may in truth exist, ordinarily the contention is advanced while disregarding conceivable relieving factors, along these lines making it by and large a to some degree as well genuine type of reductio ad absurdum. 

It should be at the center of any map going vertically: the prime meridian, as it passes through greenwich,  england, is considered 0 degrees longitude