here are data sources that show gameplay stuff you all apparently dont know how to find

A lot of people want to share the data behind their observations and perceptions when giving gameplay feedback so here's some helpful links that will allow you to give maximum gameplay feedback without having to shrink into a crying child everytime someone asks you for some simple evidence or just something to show that what you say is actually a thing and/or why it should really worry anyone

I believe these to be the best info sources for sharing such information on any given champ, please add your own if you want.

http://leagueoflegends.wikia.com/wiki/League_of_Legends_Wiki - the goto wiki for most basic information, you can also use this to see past iterations of champs like back when TFs ult was a normal ability... this site also has a list of patches items and more.

http://www.lolking.net/champions - for larger scale claims that don't need a lot of detail or precision. You can also see people's match history here

http://lol.gamepedia.com/League_of_Legends_Wiki - for tournament info and getting patch history without the lag of the other wiki

https://archive.org/web/ - for checking the past state of websites, for example if you want to see winrates on lolking from a certain date.

https://champion.gg/ - for ingame statistics and stuff

http://www.leagueofgraphs.com/champions/stats - alternative to champion.gg and arguably better in some ways.

http://www.google.com - helps you find a lot of info on a lot of things

http://www.youtube.com - has video evidence of many things and likely has a recording of things many people talk about if they aren't bullshitting you.