Thinking about why an awkward adequate (with or without ly) would be in the ransom note, I wondered whether adequate was a favorite word of either of the Ramseys. John seems to like it; in 1998 he says that child Patsy had been disciplined by verbal rebuke but "it was very adequate." (Clunk!) In Death of Innocence there are five instances of adequate: one is in the ransom note; three are in John's voice; one I didn't find. In The Other Side of Suffering, there's an adequately explain and a fuel supply that's barely adequate. It's a fairly common word, I realize, but I haven't seen an instance of Patsy using it...except in the ransom note.
I don't, though, think the ransom note was dictated by John. I think if they'd both been involved that night, they'd both look like they'd just gotten up. Neither of them did. John was showered and shaved. Patsy was made-up and dressed. She, no doubt tweaking and recopying her ransom note, had run out of time, perhaps because John got up before his 5:30 alarm went off.
Why did Patsy burn through nine pieces of paper making a ransom note stuffed with Ramsey inside baseball? I think it was a clever attempt to frame John. He wouldn't perceive that he says, percent, and hence and adequate a lot. He didn't know that SBTC came from the conspicuously open Bible on his desk. But Patsy did. When she's being quizzed about that Bible during her interview, she never asks why all the questions, but she makes sure to say that it was always closed and that only John read it. On the first floor, an open dictionary had a corner folded up pointing to the word incest.
I do think this was too much to put together on the fly. I (reluctantly) suspect that this was an idea she'd been flirting with for some time. Spring 1996 had seen the Unabomber caught because of the unique word usage in his long manifesto. The story of his arrest was a huge deal. If Patsy was expecting to be replaced by another woman, her rough treatment of JonBenet would become known. That would be unacceptable for several reasons. Someone else would need to take the blame, uncontradicted by JonBenet.