The main principle of Syadvada is the concept of conditional logic and the relativity of truth. Syadvada is a philosophical concept that originated in Jainism, an ancient Indian religion. It is also known as the theory of "many-sidedness" or "multiplicity of viewpoints."

At its core, Syadvada recognizes that truth is not absolute and can vary depending on the perspective and context in which it is viewed. This principle is based on the understanding that the universe is constantly changing and evolving, and therefore, any statement or belief can only be considered true in a specific time and space.

Syadvada acknowledges that there are multiple perspectives and interpretations of reality, and each one of them holds a certain degree of truth. This concept is often represented by the analogy of the blind men and the elephant, where each blind man touches a different part of the elephant and describes it differently, but all of them are partially correct in their descriptions.

The conditional logic aspect of Syadvada refers to the understanding that any statement or belief can only be considered true under certain conditions. For example, the statement "the sky is blue" can be true in a certain time and place, but it may not hold true in a different context, such as during a sunset or in a polluted city.

Syadvada also emphasizes the importance of considering all viewpoints and perspectives before arriving at a conclusion. This is because each individual's perception and understanding of reality is limited, and by considering multiple viewpoints, a more comprehensive and accurate understanding of truth can be achieved.

The relativity of truth in Syadvada also highlights the concept of non-absolutism, which means that no single viewpoint or belief can be considered absolute or final. This is in contrast to the concept of absolutism, where a belief or statement is considered to be true in all circumstances and for all individuals.

In summary, the main principle of Syadvada is the recognition of the relativity of truth and the use of conditional logic to understand and interpret reality. This concept encourages individuals to approach truth with an open mind and consider multiple perspectives in order to gain a more comprehensive understanding of the ever-changing universe.