Text: and no one was able to answer him a word, neither durst any man from that day forth ask him any more questions.

Correct capitalization: And no one was able to answer him a word, neither durst any man from that day forth ask him any more questions.

Text: negatives and intermediate positives of cinematographic film, exposed and developed, whether or not incorporating sound track, width >= 35 mm

Correct capitalization: Negatives and intermediate positives of cinematographic film, exposed and developed, whether or not incorporating sound track, width >= 35 mm

Text: unsure about which type of xaml file you have? do you want to know exactly what it is, who created it, and how to open it?

Correct capitalization: Unsure about which type of XAML file you have? Do you want to know exactly what it is, who created it, and how to open it?

Text: if we were to become suddenly dumb, we would have great difficulty in contacting our physical fellow beings, all the more so if we were not able to write to them either.

Correct capitalization:
If we were to become suddenly dumb, we would have great difficulty in contacting our physical fellow beings, all the more so if we were not able to write to them either.