The rule of thumb is that the destructive power of an atomic bomb increases exponentially with its size.
When dealing with potential hazards in case of an explosion, the rule of thumb is to evacuate the area immediately and seek shelter in a safe location.
The rule of thumb for determining the appropriate use of a nuclear weapon is to only use it as a last resort in self-defense when all other options have been exhausted.
In the event of a nuclear explosion, the general rule of thumb for safety measures is to seek shelter underground or in a sturdy building, stay inside to avoid exposure to radioactive fallout, and follow emergency instructions from authorities.
A good rule of thumb for determining following distance while driving is to maintain a distance of at least three seconds between your vehicle and the vehicle in front of you. This allows for enough time to react in case of sudden stops or emergencies.
If you mean what is the "Rule of Thumb" it is an old law that states a man may beat his wife with a switch, (branch, stick), no bigger around than his "thumb". And we think we are civilized!?! This is completely wrong. There has never been any such law. The urban legend stems from a court case (not a law) in which the phrase "rule of thumb" never even appears. The judge only mentions that "moderate chastisement" of a wife by her husband is not criminal. Not at all excusable, and the judge was publicly excoriated for his ruling at the time. But this is not the origin of the "rule of thumb." The phrase "rule of thumb" comes from woodworkers using the length of their thumbs for measuring instead of using rulers, and it has been in use at least since the 1600s, long before the supposed "law" about wife-beating. A "rule of thumb" is a convenient approximation.
This is an urban legend. There was no such law. The phrase "rule of thumb" comes, rather, from the time-honored practice of using the thumb to make rough measurements (think "rule" as in "ruler"). In some languages, in fact, the word for "inch" is the same as the word for "thumb" (e.g., French pouce) or is derived from it (e.g. Spanish plugada, from pulgar).
"Rule of Thumb" means a rule or principle that provides guidance to appropriate behavior.
The rule of thumb is not intended to be accurate or reliable for every given situation. When a person is doing something by the rule of thumb, they are taking an educated guess.
Don't use it if it's not yours, and you don't have permission from the owner or an exemption in the law.
what does the phrase rule of thumb mean
Rules of thumb
A misspelled "Rule of Thumb"
A rule of thumb is a broadly applicable guideline or principle based on practical experience rather than exact calculation. It is meant to provide a quick and easy way to estimate or make decisions without needing precise measurements or data.
Perhaps you're thinking of the phrase, "rule of thumb".
The University of Alabama has a law school.
A useful principle but not intended to be reliable in every situation. Meaning the situation applies to everything because long ago the rule of thumb meant 1 inch equals your top of your thumb, so thats the rule of thumb. Over the years it has taken a more figurative meaning.