1.9 sabdajnana anupati vastusunyah vikalpah
sabdajnana: verbal knowledge
anupati: followed in sequence, pursued
vastusunyah: devoid of meaning
Verbal knowledge devoid of substance is fancy or imagination.
Having an imagination is helpful (and fun) but we cannot live in this realm all the time. At some point the imaginary words or thoughts can become an untruth.