The geosynchronous sattelites we are using to talk to each other was just an idea, as was the Pheonetian alphabet, as was an American country not part of the British Empire. If you wedge that distinction between in theory and the concept is on one side and how it is actually working this year or today on the other side too far in, you push the theory -- practical, concept -- material reality distinction that is useful into a totally useless way of thinking. The horizon we use for nabigation. We compare theoretical and actual yo judge efficiency. A pure materialist or one pushes the wedge on too far can't use this useful fisyiction. Young persons will often yell that the flawed actual is horrible and should be abandoned because it is not the concept perfectly achieved. Persons who do this are unlikely to offer up or implementation t useful solutions and answers to oir problems and questions.