Facts related to "Paste"
In an effort to make it easier for the TIL community to verify submissions, we're kindly asking that contributors make a top level comment after submitting a TIL quoting the relevant text from their source (which should be concisely paraphrased in the submission title). This is not currently a requirement, but we'd appreciate it if everyone would try their best to do it. If the TIL you are posting is linking to a Wikipedia page, please directly link to the section of the Wikipedia page that is relevant to your TIL submission.
In most cases this will be 2 - 3 sentences, but up to 4 - 5 should be fine if more context is required. If it's not possible to copy/paste the text, then a screenshot of the relevant part (preferably highlighted) or indicating where in the link provided is the relevant piece of information located is also acceptable. If the source includes audio or video, then please link to the pertinent time stamp and transcribe it.
Note that if a source is just a table, graph or other raw data/statistics then you won't be able to quote it (by design) -- find another source (and see below for an explanation).
We'd also like to clarify our first rule about submissions needing to be verifiable with a reliable source that completely supports the claims in the post title. This means that you cannot interpret data and draw your own conclusions -- everything must be clearly and explicitly stated in your source, in words.
We encounter a lot of issues when people try to submit technical papers, statistical data or other studies that may support a claim, but one that the authors don't explicitly make (and hence subject to extra scrutiny). You have to make it clear when a source just provides evidence supporting/refuting a hypothesis, but doesn't go as far as explicitly stating it as an accepted fact.
This means that merely quoting statistics and implicitly generalizing the results of a study is often not acceptable. You also need to be diligent about not misleading people with overly simplified, outdated or refuted claims.
As an example, you may come across a paper describing a study where coffee consumption was found to be associated with reduced incidents of cancer. A misleading and unacceptable conclusion would be^1:
> TIL coffee can cure 58% of cancer patients
On the other hand, this would possibly be acceptable as the details make it clear that the result is not definitive:
> TIL a 2004 study found tha
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