Wow, I was just having a little gentle fun, because you picked on Knight Shift for his misuse of a word, figuring I'd do the same, since I usually only pick on someone's language when they pick on someone else first. And I get you dropping f-bombs, making childish comments about my weather posts (which you know are usually pretty good), and making the usual thinly veiled threats.
Seems a little disproportionate to me. Especially when you compounded being wrong in your original post with being really wrong in your follow up (or at least using substandard, frowned upon usage, which is certainly "wrong" for me). Let me walk you through it. You said, "But this video doesn't tell us that for sure--you know, like the word corroborate would infer."
While there may be some dictionaries that include definition 4 as acceptable, I'd be surprised if you didn't know that that usage is generally considered non-standard, especially in formal writing. The bible of dictionaries, the OED, includes that usage, but labels it non-standard.
2. infer (that)…infer something(non-standard)to suggest indirectly that something is true
http://www.oxforddictionaries.com/us/definition/learner/infer
And the same website does a very nice job explaining the differences between imply and infer, corroborating what I said in my initial post:
"When someone infers something, they reach a conclusion or decide that something is true on the basis of the evidence available." Human beings use the process of deduction to infer conclusions based on the evidence they see - a word or other inanimate object (like your use of "corroborate" (the subject which is inferring) is unable to think and therefore is unable to infer. In your example, the word corroborate would imply something (that knightshift was sure based on the video, which was incorrect, as you correctly pointed out) not infer it.
http://blog.oxforddictionaries.com/2011/10/imply-or-infer/
Lastly, in terms of how educated people should be using these words, the link below does a superb job of pointing out the differences between the two words. Feel free to keep misusing them, but don't be surprised when you get raised eyebrows or worse from your boss or editor.
Imply vs. infer
To imply is to express something indirectly. For example, you might imply that it’s time for a guest to leave by saying that you are getting tired. To infer is to surmise or conclude, especially from indirect evidence. For example, if you were to tell a guest that you’re getting tired, the guest might infer that it’s time to leave.
More broadly, infer means to deduce. For example, when the sky grows dark in the middle of the day, you might infer that it’s probably going to storm.
Infer has been used in place of imply so often and for so long that some dictionaries now list it as a synonym of imply in a secondary sense. In edited writing, however, the traditional distinction is usually kept intact.
http://grammarist.com/usage/imply-infer/