Why must not the condensed water drip into the flask?

I need you to help me with the question that I asking,the question is,why must not the condensed water drip in to the flask

The reason condensed water should not drip back into the flask is to prevent contamination and maintain the integrity of the experiment. When conducting experiments involving liquids or substances, it is crucial to separate and collect different components to accurately analyze and measure their properties.

If condensed water drips back into the flask, it can introduce impurities from the surrounding environment, affecting the purity and composition of the liquid in the flask. This contamination can lead to inaccurate results and compromise the scientific findings.

To avoid this, a setup called a condenser is typically used in scientific experiments to collect and separate condensed water or other volatile substances. A condenser is a glass tube that allows vapor to condense, usually by cooling with either water or air, and directs the liquid into a separate container, preventing it from re-entering the original flask.

By implementing proper apparatus and techniques, scientists can ensure the reliability and reproducibility of their experiments by maintaining the purity of the substances being studied.

If I knew what experiment you were doing I might be able to answer the question.