A biological theory is a general explanation for a group of related phenomena that has been tested extensively and for which there is considerable scientific support. Most biologists accept most biological theories as in fact being true, at least in the general sense. However, it is expected that certain aspects of the theory may need refinements and modification as new information is learned. To interpolate is to insert values between other values. To extrapolate is to estimate or predict values by projecting from known values.
Interpolation is common, and usually quite safe.
For example, when you construct a graph by drawing a line between measured data points you are interpolating all the values between those that were measured. Your assumption is that if you had measured them they would result in values similar to those the line crosses. Extrapolation is sometimes necessary, however, often has low reliability. Maximum The maximum number is the largest value in a series of numbers. The minimum number is the smallest value in a series of numbers.