From when he announced he was leaving. This is NOT proof of anything other than he sounds pretty happy with his time at ND. Again, this DOESN'T prove anything:

One should have proof when making an accusation. ND can't prove that he didn't because if he didn't there is nothing there. There statement is very clear. They don't have any record of him going to HR about abuse.
We could sit here all day and come up with conspiracy theories, or David could offer some proof. Anything. Names, email, or corroboration. Just something.

Which is a problem if you are accusing someone of harassment.   The ownership on proving something is on him, because ND can't disprove something that doesn't exist.  Reminds me of an argument where Christians ask an Athiest to prove that God doesn't exist.   THe Christian is the one responsible for proof as they are the one saying something is there.   David is in a similar situation.  I can't take you to court for harrassment and compel you to prove me wrong when I haven't proven myself right.  At me job, if I found that something seemed unfair or out of the ordinary, I find a way to take note of it.  Thats for my own protection. 

Of course they wouldn't find any evidence if they decided to fire him for, officially, other reasons. It wouldn't be in their interests to keep stuff like this in their records. For all I know, the alleged victim could be lying, but this is not a very convincing defense either even if it's true. This sounds like typical PR talk to me, and nothing else.

Wrong. It is in ND or any companies interest to keep and persue actions of this kind because it puts the company at risk of being sued.  Period.  Because it is against the law.  He said he was fired after having a mental breakdown.  I don't think he is lying about that.  And I don't think hey are lying about not getting any reports about it either. What has ND done in the past that would make you think they are hiding or destroyed his reports?  Not only did they say he never complained about sexual harassment, they said he never complained about harassment at all.   I am sure they will now go back and investigate to see if his claims have merit, but accusing them of hiding it is unwarrented.

They're not denying that sexual harassment occurred. They're dismissing the allegations that someone filed a sexual harassment complaint. 

They must be pretty confident on this to reply in this way. Hmm. Doesn't bode well for the accuser. Guess we'll find out how this plays out.

Good. The only person... but yea, they're not denying that any sexual harassment did or did not happen, just there is no official report of it. That makes sense, because the accuser has already admitted he didnt say/file anything. 

That's true and false. For a rape accusation to be considered a false rape accusation by the fbi, the accuser would have to be caught falsifying it and arrested for it to be counted statistically. Since the accusation is based mainly on the word of the accuser, it's very difficult to do that because you would have to catch them in a lie with some kind of physical evidence that contradicts what they said. Rape accusations on colleges are handled by the colleges in kangoroo courts and rarely go to police. Any falisified reports in those case aren't counted in these stastics either. There's no accurate rough estimates around on false accusations.

Actresses who Harvey sexually assaulted made positive comments in interviews/social media about him too. Not only does it not prove anything, it's pointless to even post.