Impact of inflation on tax savings

I do not understand why higher than expected inflation rate decrease:

  1. the value of the real tax savings from depreciation
  2. and the value of the real after-tax interest expense, everything else held constant

Could someone explain these 2 relationships?

Many thanks

https://www.analystforum.com/forums/cfa-forums/cfa-level-ii-forum/91364568

https://www.analystforum.com/forums/cfa-forums/cfa-level-ii-forum/91363568