The challenge is to find a means of communicating complexity simply and rendering such patterns comprehensible. It is not the elements that should be stressed but the pattern of relationship between them under different circumstances. As noted above, stress was placed on the manner in which forms should be conceived as complementating one another. The nature of this complementarity remains to be explored in the light of the complete range of forms. As with complementarity, the limitations on transformability remain to be explored.
Attention is required to the manner and extent to which alternatives can be used.
On the other hand the present degree of commitment to such privileged modes ensures that any substitution can only be limited and may only be possible in areas where the written mode has not yet become habitual. In the final analysis these difficulties are raised by many forms of presentation which have emerged as a consequence of industrialization. The work of the different UN Specialized Agencies through their information programmes is one example. Many more experiments have been conducted at the national level. There may be various kinds of trade-off between different advantages and disadvantages.