So you can place the liquid in a container with standardized markings. Volume can change based on temperature and pressure though. The SI unit of volume is the cubic meter. Other units used can be cubic centimeters, liters, etc. Often we choose the units based on the situation. To use units in an equation though, it's often better to start with SI units. You can convert between units of volume using ratios.
So the syllogism is valid. For a syllogism to be valid, the combined diagram must contain all the information asserted by the conclusion. It may contain more information, but it cannot omit anything. Now let's try a syllogism with a particular premise. Example:
It is important to stress that the premises of an argument do not have actually to be true in order for the argument to be valid. An argument is valid if the premises and conclusion are related to each other in the right way so that if the premises were true, then the conclusion would have to be true as well.