Iceberg of Ignorance: How Much Do Top Managers Really Know About What Happens in Their Companies? Posted byDaniel Colombo October 5, 2021 Leave a comment on Iceberg of Ignorance: How Much Do Top Managers Really Know About What Happens in Their Companies? The recurrent limited perspective that some of the most senior executives tend to have on issues that make the operation of their businesses more complex, slow and obsolete is striking.