- Because the Priest/Minister says so
- Fear - oblige to support belief. Afraid of the structure might collapse. Say that it is better to believe to keep people in line. Lying is acceptable here. Ignoring the disbelief inside. It will save society to so the ends justifies the means. It is to protects us.
- Love - disappointing those we love. How can I tell my grandma I am an atheist. It would be a betrayal.
- Guilt - lots of guilt amongst the priest because they don't believe what they are preaching. They push down guilt they feel down the believers. It is like preachers who are so angry against sexually sinning and they it is found they themselves are doing it. Thou protest too much.
- Concorde fallacy - So deep into it they cannot get out.
Name given by evolutionary biologists to a form of suboptimal behaviour found among wasps and policymakers. Certain species of wasp are observed to defend their nests with an amount of energy proportionate to the amount they have spent on building the nest. It would be more efficient for them to defend them with an amount of energy proportionate to the cost of an alternative and the strength of the aggressor. Likewise, wasteful public expenditure on the supersonic aircraft Concorde was defended on the grounds that a great deal had already been spent. But this argument is fallacious. What has been spent has been spent, regardless of what happens now. Spilt milk cannot be unspilt. Spending on Concorde should have been judged by the expected value of the extra spending being contemplated, and on that alone.
The Concorde fallacy is extremely widespread in human reasoning, with the result that policymakers who commit it are rarely punished for doing so.
- Embarrassment - cannot admit they were wrong