What is the definition of qualitative knowledge?
There are basically two kinds of observations that scientists
make, which are described as qualitative and quantitative. A
qualitative observation gives you a general description. For
example, a particular substance might be observed to be a liquid,
blue in color, in a bottle. Quantitative observation involves
measurement. For the same substance you might discover that it
weighs 1.098 kg, that it has a temperature of 23o C, and by pouring
it into a graduated cylinder, you could determine that it has a
volume of 1.3 liters, etc. Qualitative observations don't involve
numbers, and quantitative observations do.