Quote from romanus:
I think you are absolutely correct. Tapes don't lie.
Lift the blue fog of the lateral and see what's inside. B2B tape followed by...
Romanus. I've taken the liberty of defacing your chart with a mess of questions. Although we differ in what happened earlier in the day, we are in pretty good agreement with the events from 13:20 onwards. For your consideration then:
Of the two black tapes 1 and 2, which in your opinion is the ff tape aka the 'fat tape'?
When you say 'tapes don't lie' what do you exactly mean? Although I am not a mathematician, like you I like precision.
Is the FIRST event of consequence in terms of getting a P2 the breach of the tape RTL?
I drew in the dreaded LM to illustrate the point of how, if I've done the 'lateral logic' correctly, one can end up with what appears to be the wrong conclusion. What do you think? I do appreciate that Spyder has said, '... sometimes you draw a lateral and sometimes you don't.'
As an aside, after getting the PFC correct, this AM I screwed up again, by carrying over the lateral from yesterday and deriving a conclusion similar to the one I voiced at EOD today. Indeed a blue fog for a practitioner such as me, unless EOD spike bars can break a lateral.
So let's say we have bottom. What is the series of events which establish the change. Is it the breach of the blue tape (I drew in just the RTL)? Is it the breach of the 'fat tape'? Is it the breach of the traverse tape which occurred at 16;05 but has not been followed up with IBV? If any of these are correct they would seem to be confirmatory as opposed to anticipatory. In other words if bar 15:30 is the bottom, we should know that by EOB (or before) without having to consider RTL crosses.
Last question. Why did you position your B2B where you did?
TIA
lj