Which subjects/learning areas would make use of critical rationalism

I think almost almost learning area would be able to make use of critical rationalism. For the purpose of this discussion, critical rationalism is defined as the way that we should approach knowledge. Critical rationalism believes that we don't have the ultimate answers and we should continue searching for them. The search for the truth is the highest ideal. Critical rationalism does not include the need to justify your ideas. Existing rules and methods of scientific research are seen as inhibiting the search for new ideas. 

True. you know, tools like shovels.