Samsaya means
Srimad-Bhagavatam
SB Canto 3
The word saṁśaya means "doubtful knowledge."
SB 3.24.18, Purport: The word saṁśaya means "doubtful knowledge." Speculative and pseudo yogic knowledge is all doubtful. At the present moment the so-called yoga system is prosecuted on the understanding that by agitation of the different stations of the bodily construction one can find that he is God. The mental speculators think similarly, but they are all doubtful. Real knowledge is expounded in Bhagavad-gītā: "Just become Kṛṣṇa conscious. Just worship Kṛṣṇa and become a devotee of Kṛṣṇa." That is real knowledge, and anyone who follows that system becomes perfect without a doubt.