>>>>>>>I never really thought of one as being abstract. Now the square root of -1, yes, that's as abstract as it gets, but I thought one was just an ordinary integer.
>>>>>>
>>>>>>IMO i is just an extraordinary integer. But if one is prone to abstractions, one may find oneself to think of one (not oneself, but selfless one) as an abstract entity, as abstract as i is. In the concrete case... I don't know what's in that case, the lid is too heavy.
>>>>>
>>>>>If you can't even understand the darned lid, then I'm sure what's in the case will be waaaayy to heavy for you.
>>>>
>>>>If only it wasn't made of concrete, it would be much easier to understand.
>>>
>>>Ummm. Ok, that one I don't get.
>>
>>OK... how does a leather case differ from a concrete case? By material of which it's made.
>
>I thought a case was built, as in "The lawyer is building a case against him"

Which means that it makes far more sense to use concrete than leather.