What are the weak Hadiths in Sahih Al-Bukhari, what are examples of them, why did Al-Bukhari include them, and how are his rules for acceptance stringent?

The hadiths criticized in the Two Sahihs (Bukhari and Muslim) are very few, and they are either:

1. Hadiths considered authentic by their compilers but weak by others.

2. Hadiths that appeared as supporting evidence (shawahid) or corroborative narrations (mutaba'at).

3. Hadiths narrated by a weak narrator who became weak after narrating them.

4. Hadiths narrated by a weak narrator whose chain of transmission (isnad) is elevated.