The greatest degree of certainty is Fact
If your the greatest of all time you would be called either an "over lord" or "the greatest of all time".
The sun rises in the east with certainty.
Sure! "Greatest" is already a superlative that implies the highest degree of something. Adding "most" before it is redundant.
Water has the greatest density at 4ºC or 39.2ºF
The noun form of "probably" is "probability." It refers to the likelihood or chance that a particular event will occur. In various contexts, it can denote the degree of certainty regarding outcomes or events.
theory is the lowest degree of certainty
It is a measure of the degree of certainty: it is the likelihood that a specified event will occur.
hypothesis
The certainty of paternity refers to the degree of confidence that a man is the biological father of a child. Typically, paternity can be established through DNA testing with a high degree of certainty, often over 99.9%.
Certainty is often represented by statements or claims that are supported by strong evidence, extensive research, and logical reasoning. In science and mathematics, certainty is typically associated with rigorous proof and validation through repeated experiments or calculations. Additionally, peer-reviewed studies and expert consensus can also contribute to a higher degree of certainty in various fields.
The highest degree of certainty in science is typically achieved through reproducibility of results by multiple independent researchers using different methods and approaches. Consensus among experts in the field also adds to the certainty of scientific findings.
Possibly does not belong with the other two because likely and probably both indicate a higher degree of certainty, while possibly suggests a lower degree of certainty.
no
No ethnic group can be shown as superior by science with any degree of certainty.
No. Nearly is an adverb of certainty or degree , used to modify adjectives and adverbs.
The greatest.
Wherever you decide it is. (The center of the universe has not been scientifically established with any degree of certainty.)