What does it mean by we live in a gray world?

Answer 1

It means that not everything is so simple that it has a right or wrong answer.

For example, if I asked two or more people who the best music band in the world was, I may well get more than one answer back. Who would be right? We call the answers to questions such as these "subjective" or "subjective truths". This means that there is no single correct answer; the answer depends on the beliefs (or belief system) of the person asked.

However, for some questions there is only one right answer. We call these answers "objective truths". If I asked you what 1 plus 1 is equal to, then there is only one correct answer; "2". Any other answer (which does not equate to "2") is false. This is an objective truth. We can describe the situation as being "black and white" (there are only two possible states that an answer can take; right or wrong).

When the answer to a question is subjective then we can refer to it as being a shade of grey. In other words, it is not "black and white" but somewhere in between.

This saying therefore means that many of the so called "truths" in the world we live in are actually subjective truths.