Concealing the truth is not a good thing, although some would argue that there is also a noble lie that serves to protect a person from something bad. Here are some clues that may indicate someone is lying and help you pick up on these details:

1. Nervousness and restlessness - liars can often show nervousness, such as pulling their ears, covering their mouths, or sweating.

2. Eye contact - some people may avoid eye contact when lying, while others may hold it too much to appear convincing.

3. Changes in voice - changes in tone, rate or speed of speaking can be an indicator of lying.

4. Inconsistency between words and body language - if what a person says do not match his language ttendencies, it can betray a lie.

5. Covering or protective gestures - for example, crossing the arms, hiding the mouth or covering part of the face.

It should be noted that these indicators are not absolute and you cannot tell for sure if someone is lying only with them. It is always good to take a holistic approach and consider different aspects of communication to make a better analysis.