John McGahon (Fine Gael) | Oireachtas source

The witnesses have effectively taken apart the presentation of two weeks ago from Professor John FitzGerald with their six points, and that is what is good about these debates, where people appear before the committee and present one view, and a week or two later, someone else comes in and is able, quite systematically, to put an alternative view, based on facts, so I appreciate that. Professor Doyle stated:

For these reasons, the figure of €20 billion over 20 years is not a worst case scenario. It is a totally inaccurate and unreasonable starting point ...

They have outlined the six reasons in detail, but aside from that, how did the contributors at the meeting two weeks ago get it so wrong?