Make two rebuttle on each of the 10 contentions : 1. Public interest and benefit: Public sector investment in space exploration ensures that the endeavors are driven by broader societal interests and benefits rather than being solely profit-oriented. Public institutions can prioritize research and exploration missions that yield fundamental scientific knowledge, which might not have immediate commercial viability.

2. Long-term vision: Public sector investment is better suited for long-term planning and execution of space exploration initiatives due to the stability and continuity offered by governmental bodies. This enables sustained investments in both fundamental research and infrastructure development, which can be essential for progress.

3. Global cooperation: Public sector investment encourages international collaboration and cooperation in space exploration. Governments often engage in partnerships with other nations, fostering goodwill, knowledge-sharing, and technology transfers. This cooperation leads to shared discoveries and shared costs, benefiting the global scientific community.

4. Avoiding race for profit: Private sector involvement may lead to a race for profit, potentially prioritizing commercial interests over scientific and exploratory endeavors. Public sector investment ensures that exploration goals are balanced between scientific curiosity, commercial applications, and the general welfare of humankind.

5. Access and equity: Public sector investment guarantees equitable access to space exploration for all nations. Privatization might create barriers, making space exploration predominantly available only to those who can afford it, exacerbating global inequalities.

6. Safety and regulation: Public sector investment prioritizes safety and regulatory oversight, ensuring that space exploration activities adhere to international standards and minimize risks. Private sector entities might have less stringent regulations, potentially leading to safety concerns or the exploitation of resources without proper environmental safeguards.

7. Knowledge sharing: Public sector investment fosters an environment of open data sharing and collaboration among scientists and researchers. This promotes the rapid dissemination of discoveries and accelerates scientific progress without concerns of proprietary information, which may be a factor in private sector involvement.

8. Long-term cost-effectiveness: Public sector investment is often focused on long-term cost-effectiveness and sustainable development. Private sector companies might prioritize short-term financial gains and profitability, potentially neglecting investment in areas that do not yield immediate returns.

9. Unknown markets and risks: Private sector entities may be deterred from investing in unproven or less lucrative areas of space exploration due to market uncertainties and unknown risks. Public sector investment can bridge these gaps, exploring the unknown and paving the way for future private sector opportunities.

10. Public accountability: Public sector investment is subject to democratic accountability and transparency, ensuring that taxpayer funds are allocated responsibly and in the best interests of citizens. Private sector investments, on the other hand, may lack the same level of public scrutiny and oversight.