to express strongly and confidently that something is undoubtedly true or will certainly happen
to be cautious and not assume that something will succeed or happen as planned, as there is always a possibility of unforeseen obstacles or problems
used when one can claim that something is true with all one's certainty
used to say that something is so obvious that there is no need for further explanation
used when one is certain that something will happen at some point in the future
to do something that ensures that someone or something fails or something unpleasant happens to them
denoting something that has been tested many times and proved to be reliable or effective
a way of proving the validity of a claim or determining the success rate of a plan
最終試験, 試金石
a feeling of remorse, and reservation that one gets upon facing a challenge or finding oneself in an unexpected situation
to believe something strongly, even though one cannot explain why
something that is assumed to be true or already decided upon before any evidence or arguments are presented
既定の結論, 予想された結論
used to imply that something is reliable, certain, and can be trusted completely