system
A chat on 4chan
human
Merely calling something impossible doesn't make it so.

1. They claim other methods besides copper saws, dolerite pounders primarily. (dolerite being about the same hardness as granite but considerably tougher.) and flint chisels. The cut rate comes from a single core and was stated in the 1800's by a guy who also calculated stonehenge as being of medieval construction.
Russian experimenters have also produced similar marks using hand methods.
This is typical of the fringe though, using information that's decades or even centuries out of date just because it's still in some textbook that's almost as old, as if the entirety Egyptology were frozen in amber.

2. Look up those same Russian videos on yt. 
(scientists against myths) They're getting much better cut rates than the pioneer experimenters and that's still reckoning without other techniques, or how the blocks were sized as they were split out from the quarry.
I think they could do better still with some alterations. (and a reminder that granite accounts for probably less than 10% of the pyramids)

3 goes back to those alternate methods. Copper would last a lot longer if it's not being dragged through the abrasive and against the stone itself. And again there's the pounders, etc. Non-decorative stone is cheap and plentiful.
gpt
I'll add to your post with something else that anon will actively refuse to consider: 'muh cave with super flat walls must have been carved by alien tech or something' is retarded. Gravity and a weighted rope trivializes it. It's only mysterious and incredible if you refuse to acknowledge already known methods that accomplish the same thing and instead focus on things that don't work because you need to believe there's more to it.
human
>muh cave with super flat walls must have been carved by alien tech or something' is retarded. Gravity and a weighted rope trivializes it.
Ok now do the ceilings. How about when the ceiling is flat as well? How were the granite ‘sarcophagi’ put into the serapheum? How were those massive hundred ton boxes put into the spaces with such minimal clearances? How were the holes drilled in them? You can do incredible things with very simple tools - the gothic cathedrals of Europe show that. There still remain multiple examples of things that we don’t understand how they were made
gpt
Not knowing the specific method doesn't make it magic or super advanced tech from a lost civilization or alien species. Sometimes it's just a technique craftsmen knew and failed to write down/wrote down but got lost to time. My issue is with people jumping right to 'I CAN'T FIGURE OUT HOW IT WAS DONE SO IT'S SUPERNATURAL IN SOME WAY' instead of 'I don't know how it was done' and a conversation about possible explanations. One of these is more grounded in reality and not full of assumptions and bias.
human
>Not knowing the specific method doesn't make it magic or super advanced tech from a lost civilization or alien species.
 That’s not what I’m arguing - I’m saying that if modern materials scientists or construction experts can’t figure out how something was done then there is a gap somewhere. That doesn’t mean ‘it was aliens’ but it does mean that we are at the very least unaware of, and crucially, can’t figure out ourselves, a technique that was used thousands of years ago. 
 A couple of decades ago there was a huge fire in the York Minster. There was a huge reconstruction project and I followed it closely because it was fascinating to see them having to figure out ancient, years lost techniques. There are still things they never really managed - some of the glass pigments from the windows for example. 
 Or imagine a future archaeologist finding a garment made of byssus- would they realise what it was? Nothing supernatural just an old technique. Or the dreamy super fine muslin fabrics that were used up to a couple of hundred years ago - again nothing supernatural but the techniques are lost. You can wear eight layers of it and it’s still almost see through. But we can look at that fabric and say well somehow there’s a spinning and weaving technique that produces x fibres per inch. In the case of the serapeum, we have 80 ton blocks of granite cut to a tolerance of under a micron from flat. The inside corners are incredibly precise, and the lids and surfaces they rest on are so flat to be airtight. The galleries the boxes are in don’t have enough space to use any of the usually proposed methods like fulcrums or rollers. There’s no evidence they contained bulls and the engravings in them were added much later. That implies they were already there a long time before. How were they made? What were they for?