Re: [isabelle] Odd failure to match local statement with pending goal.
I'm afraid I can't. In general, the name of a bound variable should be irrelevant. I considered the possibility of a hidden effect on type inference, but all variables have the same type, namely tree.
On 27 Jul 2011, at 12:21, Bertram Felgenhauer wrote:
> The failure disappears if I rename the r'a to r'a' inside the existential
> quantifier of the conclusion (included as a comment in the attachment),
> i.e., simply by doing an alpha conversion. I find this very odd. Can
> anybody explain this behaviour?
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