Islam teaches you to talk and act based on knowledge. Don’t be reckless or slapdash person. If you head up to something that you don’t have knowledge on it, just say you don’t know.
وَلَا تَقْفُ مَا لَيْسَ لَكَ بِهِ عِلْمٌ ۚ إِنَّ السَّمْعَ وَالْبَصَرَ وَالْفُؤَادَ كُلُّ أُولَٰئِكَ كَانَ عَنْهُ مَسْئُولًا
“And do not pursue that of which you have no knowledge. Indeed, the hearing, the sight and the heart – about all those [one] will be questioned” [Al Isra: 36].
That’s why, Ibn ‘Abdil-Barr (may Allah blesses him) says:
صحّ عن أبي الدرداء ” لا أدري ” نصف العلم
“It is authentically related from Abu Dardaa’ that saying ‘I do not know’ is half of knowledge” [Jaami’ Bayaanil ‘Ilm Wa Fadhlih, 1/54].
These words show the danger of speaking without knowledge, in this case it is better to acknowledge that we doesn’t know.
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