وَإِن تُطِعْ أَكْثَرَ مَن فِى ٱلْأَرْضِ يُضِلُّوكَ عَن سَبِيلِ ٱللَّهِ إِن يَتَّبِعُونَ إِلَّا ٱلظَّنَّ
"If you obey most of those on the earth, they will lead you astray from the way of God. They follow nothing but conjecture."
I record this as an observation: the verse openly rejects the majority as a measure. And its ground is tied to knowledge: in yattabiʿūna illa'l-ẓann.
The root ظ-ن-ن was the whole axis of al-Jāthiya (45/24, 45/32) and at Fuṣṣilat 41/23 it was treated that conjecture is a cause of ruin, and the same ruling at Yūnus 10/36 (inna'l-ẓanna lā yughnī mina'l-ḥaqqi shayʾā). I rely on that treatment.