1) Could there possibly be something wrong with removing the naturally unwanted nuts from the yum chocolate that's in a bowl?
2) What about getting those annoying bones out of my salmon?
3) What then about eating the delicious chicken off my plate whilst leaving the veg?
After threshing, a mixed collection of waste matter remained there with grain kernels. They were sorted and removed by hand.
So, for us it's a matter of choosing the bad from the good, eg, removing spoiled cherries from a bowel of cherries. This would be the melacha.
The prohibition would also apply to things less desirable so if don't want nuts that are mixed with chocolate you couldn't remove the nuts, even if you happen to like both.
Note, this melacha applies to both food and non food items, such as a mixture of cutlery.
For us to have an issue of "sorting", 2 factors need to exist:
1) there must be a mixture 
2) there must be 2 types in the mixture
So, a bowl of cherries and blueberries has both criteria. Or a pile of mixed cutlery would too.
But, if let's say clothing in a cupboard isn't mixed but hung loosely to each other, no problem.
Or if it's just 1 type it's OK too, eg 2 cookies. 
But, if a chocolate cake and coffee flavoured cake, that's 2 types, and therefore not ok.
Other examples of things considered mixed:
1) peanuts with raisins
2) an assortment of laundry in a basket
3) assorted books stacked together 
4) loose pages of books that got mixed.
5) bones in fish 
6) seeds in melon
7) wrappers stuck to a candy 
8) grapes attached to stems
9) cream on top of milk
10) hair in a liquid
Other examples of things not considered mixed:
1) oranges and tangerines scattered on a table 
2) assorted cutlery spread out on a table
3) apples in a bag
4) food on a plate 
But..what if it's got the 2 criteria, ie a mixture and 2 types, is any way to get what I need out of the mixture? Eg how to eat a grape as its attached to its stem?! 
When have these 3 criteria it's ok:
1) by hand as opposed to with a utensil like a fork or a sieve.
You are allowed to use a utensil when its being used solely for convenience, eg cutlery so your hands stay clean.
2) the good from the bad
3) for immediate use
So, to get chocolate from nuts, remove the 1 you want by hand for immediate use, it's that simple😄😉
Other ways to get what you desire from a "mixture":
1) Peeling fruits or removing wrappers
2) Cutting away some of the good with part of the bad, eg cut a little good bit of melon together with the pits
3) Scatter the mixture so it's no longer a mixture, eg scatter the washing or the cutlery and then you can take piece by piece 
Lots of real life examples of this all next week..

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