operator: such-that-or

    description:
        such-that-or[op1, op2, ... , opn] seq 
        filters the given sequence to elements that return true for at least one operator in op1, ... , opn
        contrast with such-that-and[] that filters to elements that return true for all operators in op1, ... , opn
        where the coeff of |true> must be >= 0.5     

    examples:
        list-of |colors> => |red> + |orange> + |yellow> + |green> + |blue> + |indigo> + |violet>
        list-of |digits> => range(|0>, |9>)
        list-of |furniture> => |chair> + |table> + |lamp>
        list-of |names> => |John> + |Mary> + |Sam> + |Emma> + |Liz> + |Jack> + |Fred>
        list-of |animals> => |dog> + |cat> + |horse> + |mouse> + |elephant> + |rabbit>
        list-of |things> => list-of split |colors digits furniture names animals>
        
        is-a-color |*> #=> is-mbr(|_self>, list-of |colors>)
        is-a-digit |*> #=> is-mbr(|_self>, list-of |digits>)
        is-furniture |*> #=> is-mbr(|_self>, list-of |furniture>)
        is-a-name |*> #=> is-mbr(|_self>, list-of |names>)
        is-an-animal |*> #=> is-mbr(|_self>, list-of |animals>)
        
        such-that-or[is-a-digit, is-a-name] list-of |things>
            |0> + |1> + |2> + |3> + |4> + |5> + |6> + |7> + |8> + |9> + |John> + |Mary> + |Sam> + |Emma> + |Liz> + |Jack> + |Fred>

    see also:
        such-that, such-that-and
        
    TODO:
        fix quirk so we don't need literal operator wrappers around function operators.
        eg: is-prime |*> #=> is-prime |_self>