这一推理是虚幻的，制造了有效性的假象。

The reasoning is ___illusory, creating the appearance of validity.

这个广告承诺的效果其实只是虚幻的假象。

The effects promised in this advertisement are merely ___illusory.

她以为找到了完美的解决方案，但那只是虚幻的希望。

She thought she found the perfect solution, but it was just an ___illusory hope.