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Yea, sure. Like shaking hands with a pretty woman demonstrates how easy it would be to seduce her.
What the LONE WOLFERS can never tell us is this: What's the next move? Climbing from point A to point X is always a series of moves, using one's hands and feet, A, B, C,...X.
Maybe you'd like to answer the question LondonJohn, from standing on the grate of the lower window, just what is THE NEXT move? Enough of this "not irrational to hypothesise" talk.
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From standing on the grating of the lower window it would be pretty easy, I would have thought. Certainly, both Micheli and Massei accepted it would have been possible to climb up, Micheli stating that the climber would need to be "athletic" but that it wouldn't take "a Spiderman" (hmmm, it just occurred to me that some of the articles on TJMK in which they say you'd need to be "Spiderman" to get up to the window may have been based on a google mistranslation of Micheli's report, where negatives are turned into positives, heh) while Massei objects that the climber would've left traces, but never says it would be impossible to climb up.
I think climbing up for someone like Guede (tall, athletic, probably done this sort of thing before) would've been straightforward. Personally I think he broke the window from close range while standing on the grating, though I can accept the point made by an earlier poster that getting onto the lower grating while holding the rock would've been tricky. But still, I don't think it would've been impossible: from a picture I was just looking at, it seems the bricks beneath the window might be from an earlier incarnation of the building, they seem to jut out a bit rather than be perfectly flat. If that's the case I think he could've gotten up to the grating fairly easily, even holding the rock, by using the bricks as a foothold.
Alternatively, perhaps he had his backpack with him, and carried the rock up that way. Or perhaps someone else was with him, not in the house itself, but just outside to give him a lift getting up to the grating and hand him the rock afterwards. Perhaps the person was keeping a look-out, tried to get Guede's attention when he saw Meredith approaching, but by that time Guede was in the bathroom; maybe he gave Guede a bit of money to leave the country, on the understanding that he wouldn't be dragged into it later. Maybe this is the mysterious "other man" Guede keeps talking about. Who knows?
The point is that to jump from 'this would've been a bit tricky' to 'the break-in was staged and AK and RS are the culprits which means they're guilty of murder' is a massive leap. There are many possibilities as to how Guede got in, including the possibility that he broke the window but wasn't able to climb up, finding another way to get in (maybe someone left a window open on the balcony, for example).
In the burglary in the lawyer's office, someone disabled the security alarm. It seems quite unlikely Guede would've known how to do this. Do we then conclude it was an inside job?