Final answer:
The criteria for a speculative level of certainty in philosophy involve a careful examination of justification, evidence, and the level of disruption to accepted knowledge.
Step-by-step explanation:
The criteria for a speculative level of certainty in philosophy depends on the level of justification required for knowledge. Certainty is a very strict measure of justification, and it is difficult to achieve in philosophical skepticism. One possible response to skepticism is to deny that certainty is necessary for justification.
For example, Moore's response to skepticism argues that we can have knowledge and justification based on evidence and warranted claims. Another principle in philosophy is that extraordinary claims require extraordinary evidence. This means that a novel claim that disrupts accepted knowledge will need more evidence to make it credible than a claim that aligns with established beliefs.
In summary, the criteria for a speculative level of certainty in philosophy involve a careful examination of justification, evidence, and the level of disruption to accepted knowledge.