They deem that everything has its reason to exist only if it actually exists in this world.

他们认为万事万物只要存在于这个世间，就一定有它存在的理由。

youdao

If it actually exists it must be somewhere, and, assuming its place to be accessible to you, you can verify its factualness by direct observation. Take the case of the White House.

如果它实际存在，它必定在某处，而且，假如那个地方你很容易进去，你可以直接观察查证它的真实性。

youdao

If it actually exists it must be somewhere, and, assuming its place to be accessible to you, you can verify its factualness by direct observation. Take the case of the White House.

如果它实际存在，它必定在某处，而且，假如那个地方你很容易进去，你可以直接观察查证它的真实性。

youdao