theory: you use in theory to say that although something
is supposed to happen or to be the case, it may not in fact happen
or be the case.
here capacity means ability
in practice: what happens in practice is what really
happens, in contrast to what is supposed to happen.
if something is affordable, you have enough money to be able
to pay for it
the control or possession of a particular thing by only one person,
group or, as in this case, organisation
property rights: legal rights protecting the results of creativity
and giving the person or organisation owning the rights the right
to control their use
here dictate means control