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    $\begingroup$ Also discussed here. Note that With doesn't evaluate its second argument at all (it becomes evaluated after leaving With), while Block evaluates it. This helps to understand the difference you describe. $\endgroup$ Commented Dec 9, 2017 at 17:30
  • $\begingroup$ @AlexeyPopkov thanks for pointing me to it ! $\endgroup$ Commented Dec 9, 2017 at 17:52