Defendant appeals his conviction of burglary in the second degree, ORS 164.215, robbery in the third degree, ORS 164.395, and assault in the fourth degree, ORS 163.160. The sole issue we address is the admissibility of inculpatory statements made during an interview prior to a polygraph examination.1 We reverse and remand.
Prior to trial defendant agreed to submit to a polygraph examination to be administered by Officer Lat-tin of the Oregon State Police. Defendant entered into a stipulation as to the results of the examination, which provides in part:
”4. It is further stipulated that the results of the polygraph examination will be admissible in court in the trial of the above-entitled case. However, if the results of the polygraph are inconclusive, neither side will mention the polygraph examination during trial.”
This stipulation was signed by defendant, his attorney, and the deputy district attorney. The stipulation was accompanied by a Certificate of Understanding, signed by defendant, which contains the following provision:
"4.1 understand that by taking a polygraph examination I waive my rights of presence of counsel and the right to remain silent. I understand that any statements made by me during the said polygraph examination may be used against me in a court of law.”
Prior to the interview, Officer Lattin advised defendant: that he had the right to remain silent; that he had the right to refuse to take the polygraph examination; that anything he said could be used against him in a court of law; that he had the right to a lawyer and *610to have that lawyer present with him during questioning; that if he could not afford to hire a lawyer, one would be appointed to represent him at no expense before questioning if he so desired; that if he decided to give a statement, he could stop talking at any time he wished; and that if he decided to take the polygraph examination, he could terminate the examination any time he wished.
During the interview preceding the use of the machine, defendant made inculpatory statements. Defendant proceeded to complete the polygraph examination, the results of which were determined to be inconclusive.
At the pretrial hearing on the admissibility of the pretest statements in question, Officer Lattin testified that the pretest interview, which is used to help construct the polygraph examination, is an "integral part” of the examination. Elaborating, he stated:
"In terms of the polygraph examination in its totality, it’s my opinion that a polygraph examination begins when an individual walks into the room and ends when the individual walks out of the room.”
He noted that suspects often change their story from that previously given, and explained that the defendant was informed before the interview that he was being tested on what he believed to be true at the date of the test. He added that "a good, qualified, accurate or reliable examination needs a pre-test.” The trial court also heard defendant testify that he took the polygraph examination voluntarily. The court ruled that the statements were admissible, but that no mention would be made at the trial of the fact that there was a polygraph examination or of the factual context in which the statements were made. At trial, Officer Lattin testified to defendant’s statements in accordance with the trial court’s order.
Defendant argues that under State v. Thompson, 30 Or App 379, 567 P2d 132 rev den (1977), the state*611ments in question 2 were inadmissible.2 In Thompson, the defendant had agreed under a protective court order to take a polygraph examination, the results of which would be disclosed only to defense attorneys. Prior to the interview, the examiner told the defendant that anything he said could be used against him in a court of law. The defendant then made admissions tantamount to a confession of guilt. Defendant was never connected to the polygraph machine. Those statements were admitted at trial over defendant’s objection. We stated:
" * * * [Defendant] was led to believe from both the above representations and the protective order of the circuit court that everything that was said and done during the examination would be a secret and would be disclosed only to his attorneys. To use admissions made by and obtained from a defendant under the above circumstances smacks of deception and falls short of the standards of fair play in criminal proceedings inherent in our system of justice. Accordingly, we hold that it was reversible error to allow the polygraph examiner to testify concerning statements obtained under the circumstances shown in this case.” 30 Or App at 383.
The admissibility of the statements depends upon whether they were made pursuant to stipulation that they would be admissible in evidence. In contrast to the situation in Thompson, defendant here made the incriminating statements with the understanding that they would be admissible at trial only if the results of the test were conclusive, either as to defendant’s truthfulness or lack of it. This distinction alone, however, is not decisive. We observe a fatal ambiguity in the stipulation entered into by defendant. The provision that in the event of inconclusive results, "neither side will mention the polygraph examination during trial” *612is reasonably subject to at least two differing interpretations by a person of ordinary understanding: (1) there will be no mention at trial of the fact of the examination; and (2) there will be no mention of the fact of the examination or of anything that transpired as part of it.
In Thompson, as in the present case, defendant argued that the "polygraph examination” included the pretest interview. The same polygraph examiner, Officer Lattin, conducted the interview in each case. Lattin testified in Thompson as here that the pretest interview was an integral part of the polygraph examination as a whole, and that the pretest interview was fundamental because the examination would not be reliable without it. He further testified that, although defendant was never connected to the polygraph machine, it was his opinion that he conducted a portion of the polygraph examination. In Thompson, Lieutenant Riegel of the Oregon State Police, a qualified polygraph examiner, also testified. He stated his opinion that the pretest interveiw is part of the examination and that the examination begins the moment he begins talking to the person to be interviewed.
Thus, in Thompson as here we were presented with the issue of whether the "polygraph examination” included the pretest interview. Although the Thompson opinion did not expressly address the issue, implicit in that case’s holding that the statements were inadmissible is the conclusion that those statements were a part of the polygraph examination.
From defendant’s testimony at the pretrial hearing, it appears likely he was led to believe that in the event the test results were inconclusive no statements he made after he entered the examination room would be admissible at trial.3
*614 Where a defendant has agreed to waive his right to remain silent under specific conditions, he is entitled to have those conditions scrupulously adhered to. We conclude that the trial court erred in admitting evidence of the statements in question.
Reversed and remanded for new trial.
Defendant also argues that the conviction for assault, which the trial court merged with the robbery conviction, should be stricken from the judgment order. Due to our disposition of this appeal, we do not reach this issue.
Defendant renews the contention made in Thompson that pretest statements constitute "results” of the test as that term was used in the stipulation, and must, therefore, be excluded. As in Thompson, we decline to equate those statements with the "results” of the polygraph examination.
Defendant testified at the pretrial hearing as follows:
"Q On the day that you took the polygraph, did you have some *613conversation with the polygraph examiner before actually being hooked up on the test?
"A Yes, I did.
"Q And that conversation that you had with him: did you understand —
"MR. GARDNER: Objection, your Honor.
"THE COURT: Well, finish the question first, and I will hear it.
"Q (By Ms. Eyerman) The conversation that you had with the polygraph examiner: did you understand that that could or could not be admissible in court?
"MR. GARDNER: Objection-leading, suggesting the answer.
"THE COURT: Oh, it’s leading, but I don’t think we will ever get an answer unless we do.
"Objection overruled. You may answer, if you understand.
"THE WITNESSES: No. I understood that inconclusive meant jt couldn’t be used in court.
"Q (By Ms. Eyerman) What couldn’t be used in court?
"A My statements used for the results of the polygraph test.”
From the court’s pretrial ruling that the statements would be admissible, it is apparent that, contrary to the dissent’s contention, the court did not make a credibility finding adverse to defendant. The court stated:
" * * * But it’s apparent to the Court that either the form of stipulation and certificate of understanding should be amended in future cases, or else if such statements are held to be admissible, it would, of course, limit to a great extent the willingness of defendants to enter into such agreements.
"The basic fairness of the thing appears to indicate that — appears to support the defendant’s position. But, looking at it from the legal aspect, the only thing that the stipulation prohibits is mention of the polygraph examination. There is nothing in the stipulation, in and of itself, which would preclude the use of these pre-trial [sic — pretest?] statements.
* * *
"But, the only way to get this thing to a head is for the Court to rule that the statements are admissible, as I think they are under this stipulation. And then, if the Court of Appeals finds that that’s unduly unfair to a defendant, they, undoubtedly, will fire it back. But, looking at the four comers of the stipulation, the stipulation does not prohibit the use of these pre-test statements.
"I will rule that the statement may be admitted in evidence.”
Although the court agreed with defendant’s position that standards of fairness dictate exclusion of the statements due to difficulties in the wording of the stipulation and Certificate of Understanding, the court interpreted the stipulation to permit the statements to be admitted into evidence. As stated in the text, we disagree with that ruling.